diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/README.md b/lib/node_modules/@stdlib/lapack/base/dlangt/README.md
new file mode 100644
index 000000000000..6f7f985edf4f
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/README.md
@@ -0,0 +1,215 @@
+
+
+# dlangt
+
+> Return the value of the one-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a real tridiagonal matrix.
+
+
+
+## Usage
+
+```javascript
+var dlangt = require( '@stdlib/lapack/base/dlangt' );
+```
+
+#### dlangt( norm, N, DL, strideDL, D, strideD, DU, strideDU )
+
+Returns the value of the specified norm of a real tridiagonal matrix `A`.
+
+```javascript
+var Float64Array = require( '@stdlib/array/float64' );
+
+var DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+var D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+var DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+
+var norm = dlangt( 'M', 4, DL, 1, D, 1, DU, 1 );
+// returns 7.0
+```
+
+The function has the following parameters:
+
+- **norm**: specifies the norm type (`'M'`/`'m'`: max norm, `'1'`/`'O'`/`'o'`: one norm, `'I'`/`'i'`: infinity norm, `'F'`/`'f'`/`'E'`/`'e'`: Frobenius norm).
+- **N**: order of the matrix `A`. When `N = 0`, the function returns `0`.
+- **DL**: [`Float64Array`][mdn-float64array] containing the `(N-1)` sub-diagonal elements.
+- **strideDL**: stride length for `DL`.
+- **D**: [`Float64Array`][mdn-float64array] containing the `N` diagonal elements.
+- **strideD**: stride length for `D`.
+- **DU**: [`Float64Array`][mdn-float64array] containing the `(N-1)` super-diagonal elements.
+- **strideDU**: stride length for `DU`.
+
+Note that indexing is relative to the first index. To introduce an offset, use [`typed array`][mdn-typed-array] views.
+
+#### dlangt.ndarray( norm, N, DL, sdl, odl, D, sd, od, DU, sdu, odu )
+
+Returns the value of the specified norm using alternative indexing semantics.
+
+```javascript
+var Float64Array = require( '@stdlib/array/float64' );
+
+var DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+var D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+var DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+
+var norm = dlangt.ndarray( 'M', 4, DL, 1, 0, D, 1, 0, DU, 1, 0 );
+// returns 7.0
+```
+
+The function has the following additional parameters:
+
+- **sdl**: stride length for `DL`.
+- **odl**: starting index for `DL`.
+- **sd**: stride length for `D`.
+- **od**: starting index for `D`.
+- **sdu**: stride length for `DU`.
+- **odu**: starting index for `DU`.
+
+
+
+
+
+
+
+## Notes
+
+- `dlangt()` corresponds to the [LAPACK][LAPACK] function [`dlangt`][lapack-dlangt].
+
+
+
+
+
+
+
+## Examples
+
+
+
+```javascript
+var Float64Array = require( '@stdlib/array/float64' );
+var dlangt = require( '@stdlib/lapack/base/dlangt' );
+
+var DL = new Float64Array( [ 3.0, -2.0, 1.0, 4.0 ] );
+var D = new Float64Array( [ -1.0, 5.0, -3.0, 2.0, 7.0 ] );
+var DU = new Float64Array( [ 2.0, -1.0, 4.0, -3.0 ] );
+
+console.log( 'Max norm:', dlangt( 'M', 5, DL, 1, D, 1, DU, 1 ) );
+console.log( 'One norm:', dlangt( '1', 5, DL, 1, D, 1, DU, 1 ) );
+console.log( 'Infinity norm:', dlangt( 'I', 5, DL, 1, D, 1, DU, 1 ) );
+console.log( 'Frobenius norm:', dlangt( 'F', 5, DL, 1, D, 1, DU, 1 ) );
+```
+
+
+
+
+
+
+
+* * *
+
+
+
+## C APIs
+
+
+
+
+
+
+
+
+
+
+
+### Usage
+
+```c
+TODO
+```
+
+#### TODO
+
+TODO.
+
+```c
+TODO
+```
+
+TODO
+
+```c
+TODO
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+### Examples
+
+```c
+TODO
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+[lapack]: https://www.netlib.org/lapack/explore-html/
+
+[lapack-dlangt]: https://netlib.org/lapack/explore-html/d5/d0e/group__langt.html
+
+[mdn-float64array]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float64Array
+
+[mdn-typed-array]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray
+
+
+
+
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/benchmark/benchmark.js b/lib/node_modules/@stdlib/lapack/base/dlangt/benchmark/benchmark.js
new file mode 100644
index 000000000000..e3be6d4e6838
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/benchmark/benchmark.js
@@ -0,0 +1,109 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var dlangt = require( './../lib/dlangt.js' );
+
+
+// VARIABLES //
+
+var options = {
+ 'dtype': 'float64'
+};
+
+
+// FUNCTIONS //
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} len - matrix order
+* @returns {Function} benchmark function
+*/
+function createBenchmark( len ) {
+ var DL;
+ var DU;
+ var D;
+
+ D = uniform( len, -100.0, 100.0, options );
+ DL = uniform( len - 1, -100.0, 100.0, options );
+ DU = uniform( len - 1, -100.0, 100.0, options );
+ return benchmark;
+
+ /**
+ * Benchmark function.
+ *
+ * @private
+ * @param {Benchmark} b - benchmark instance
+ */
+ function benchmark( b ) {
+ var v;
+ var i;
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ v = dlangt( 'M', len, DL, 1, D, 1, DU, 1 );
+ if ( isnan( v ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ }
+ b.toc();
+ if ( isnan( v ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+ }
+}
+
+
+// MAIN //
+
+/**
+* Main execution sequence.
+*
+* @private
+*/
+function main() {
+ var len;
+ var max;
+ var min;
+ var f;
+ var i;
+
+ min = 1; // 10^min
+ max = 6; // 10^max
+
+ for ( i = min; i <= max; i++ ) {
+ len = pow( 10, i );
+ f = createBenchmark( len );
+ bench( format( '%s:len=%d', pkg, len ), f );
+ }
+}
+
+main();
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/benchmark/benchmark.ndarray.js b/lib/node_modules/@stdlib/lapack/base/dlangt/benchmark/benchmark.ndarray.js
new file mode 100644
index 000000000000..8a84f3ec6138
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/benchmark/benchmark.ndarray.js
@@ -0,0 +1,109 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var uniform = require( '@stdlib/random/array/uniform' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var dlangt = require( './../lib/ndarray.js' );
+
+
+// VARIABLES //
+
+var options = {
+ 'dtype': 'float64'
+};
+
+
+// FUNCTIONS //
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} len - matrix order
+* @returns {Function} benchmark function
+*/
+function createBenchmark( len ) {
+ var DL;
+ var DU;
+ var D;
+
+ D = uniform( len, -100.0, 100.0, options );
+ DL = uniform( len - 1, -100.0, 100.0, options );
+ DU = uniform( len - 1, -100.0, 100.0, options );
+ return benchmark;
+
+ /**
+ * Benchmark function.
+ *
+ * @private
+ * @param {Benchmark} b - benchmark instance
+ */
+ function benchmark( b ) {
+ var v;
+ var i;
+
+ b.tic();
+ for ( i = 0; i < b.iterations; i++ ) {
+ v = dlangt( 'M', len, DL, 1, 0, D, 1, 0, DU, 1, 0 );
+ if ( isnan( v ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ }
+ b.toc();
+ if ( isnan( v ) ) {
+ b.fail( 'should not return NaN' );
+ }
+ b.pass( 'benchmark finished' );
+ b.end();
+ }
+}
+
+
+// MAIN //
+
+/**
+* Main execution sequence.
+*
+* @private
+*/
+function main() {
+ var len;
+ var max;
+ var min;
+ var f;
+ var i;
+
+ min = 1; // 10^min
+ max = 6; // 10^max
+
+ for ( i = min; i <= max; i++ ) {
+ len = pow( 10, i );
+ f = createBenchmark( len );
+ bench( format( '%s::ndarray:len=%d', pkg, len ), f );
+ }
+}
+
+main();
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/docs/repl.txt b/lib/node_modules/@stdlib/lapack/base/dlangt/docs/repl.txt
new file mode 100644
index 000000000000..341e66dff205
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/docs/repl.txt
@@ -0,0 +1,100 @@
+
+{{alias}}( norm, N, DL, strideDL, D, strideD, DU, strideDU )
+ Returns the value of the one-norm, Frobenius norm, infinity-norm, or the
+ largest absolute value of any element of a real tridiagonal matrix.
+
+ Parameters
+ ----------
+ norm: string
+ Norm type.
+
+ N: integer
+ Order of the matrix.
+
+ DL: Float64Array
+ Sub-diagonal elements (length N-1).
+
+ strideDL: integer
+ Stride length for `DL`.
+
+ D: Float64Array
+ Diagonal elements (length N).
+
+ strideD: integer
+ Stride length for `D`.
+
+ DU: Float64Array
+ Super-diagonal elements (length N-1).
+
+ strideDU: integer
+ Stride length for `DU`.
+
+ Returns
+ -------
+ out: number
+ Matrix norm value.
+
+ Examples
+ --------
+ > var DL = new {{alias:@stdlib/array/float64}}( [ 1.0, 2.0, 3.0 ] );
+ > var D = new {{alias:@stdlib/array/float64}}( [ 4.0, 5.0, 6.0, 7.0 ] );
+ > var DU = new {{alias:@stdlib/array/float64}}( [ 1.0, 1.0, 1.0 ] );
+ > {{alias}}( 'M', 4, DL, 1, D, 1, DU, 1 )
+ 7.0
+
+
+{{alias}}.ndarray( norm, N, DL, sdl, odl, D, sd, od, DU, sdu, odu )
+ Returns the value of the one-norm, Frobenius norm, infinity-norm, or the
+ largest absolute value of any element of a real tridiagonal matrix using
+ alternative indexing semantics.
+
+ Parameters
+ ----------
+ norm: string
+ Norm type.
+
+ N: integer
+ Order of the matrix.
+
+ DL: Float64Array
+ Sub-diagonal elements (length N-1).
+
+ sdl: integer
+ Stride length for `DL`.
+
+ odl: integer
+ Starting index for `DL`.
+
+ D: Float64Array
+ Diagonal elements (length N).
+
+ sd: integer
+ Stride length for `D`.
+
+ od: integer
+ Starting index for `D`.
+
+ DU: Float64Array
+ Super-diagonal elements (length N-1).
+
+ sdu: integer
+ Stride length for `DU`.
+
+ odu: integer
+ Starting index for `DU`.
+
+ Returns
+ -------
+ out: number
+ Matrix norm value.
+
+ Examples
+ --------
+ > var DL = new {{alias:@stdlib/array/float64}}( [ 1.0, 2.0, 3.0 ] );
+ > var D = new {{alias:@stdlib/array/float64}}( [ 4.0, 5.0, 6.0, 7.0 ] );
+ > var DU = new {{alias:@stdlib/array/float64}}( [ 1.0, 1.0, 1.0 ] );
+ > {{alias}}.ndarray( 'M', 4, DL, 1, 0, D, 1, 0, DU, 1, 0 )
+ 7.0
+
+ See Also
+ --------
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/docs/types/index.d.ts b/lib/node_modules/@stdlib/lapack/base/dlangt/docs/types/index.d.ts
new file mode 100644
index 000000000000..98e3dc280e3f
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/docs/types/index.d.ts
@@ -0,0 +1,119 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+// TypeScript Version: 4.1
+
+///
+
+/**
+* Interface describing `dlangt`.
+*/
+interface Routine {
+ /**
+ * Returns the value of the one-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a real tridiagonal matrix.
+ *
+ * @param norm - norm type: 'M', '1'/'O', 'I', or 'F'/'E'
+ * @param N - order of the matrix
+ * @param DL - sub-diagonal elements (length N-1)
+ * @param strideDL - stride length for `DL`
+ * @param D - diagonal elements (length N)
+ * @param strideD - stride length for `D`
+ * @param DU - super-diagonal elements (length N-1)
+ * @param strideDU - stride length for `DU`
+ * @returns matrix norm value
+ *
+ * @example
+ * var Float64Array = require( '@stdlib/array/float64' );
+ *
+ * var DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+ * var D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+ * var DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+ *
+ * var v = dlangt( 'M', 4, DL, 1, D, 1, DU, 1 );
+ * // returns 7.0
+ */
+ ( norm: string, N: number, DL: Float64Array, strideDL: number, D: Float64Array, strideD: number, DU: Float64Array, strideDU: number ): number;
+
+ /**
+ * Returns the value of the one-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a real tridiagonal matrix using alternative indexing semantics.
+ *
+ * @param norm - norm type: 'M', '1'/'O', 'I', or 'F'/'E'
+ * @param N - order of the matrix
+ * @param DL - sub-diagonal elements (length N-1)
+ * @param strideDL - stride length for `DL`
+ * @param offsetDL - starting index for `DL`
+ * @param D - diagonal elements (length N)
+ * @param strideD - stride length for `D`
+ * @param offsetD - starting index for `D`
+ * @param DU - super-diagonal elements (length N-1)
+ * @param strideDU - stride length for `DU`
+ * @param offsetDU - starting index for `DU`
+ * @returns matrix norm value
+ *
+ * @example
+ * var Float64Array = require( '@stdlib/array/float64' );
+ *
+ * var DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+ * var D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+ * var DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+ *
+ * var v = dlangt.ndarray( 'M', 4, DL, 1, 0, D, 1, 0, DU, 1, 0 );
+ * // returns 7.0
+ */
+ ndarray( norm: string, N: number, DL: Float64Array, strideDL: number, offsetDL: number, D: Float64Array, strideD: number, offsetD: number, DU: Float64Array, strideDU: number, offsetDU: number ): number;
+}
+
+/**
+* Returns the value of the one-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a real tridiagonal matrix.
+*
+* @param norm - norm type: 'M', '1'/'O', 'I', or 'F'/'E'
+* @param N - order of the matrix
+* @param DL - sub-diagonal elements (length N-1)
+* @param strideDL - stride length for `DL`
+* @param D - diagonal elements (length N)
+* @param strideD - stride length for `D`
+* @param DU - super-diagonal elements (length N-1)
+* @param strideDU - stride length for `DU`
+* @returns matrix norm value
+*
+* @example
+* var Float64Array = require( '@stdlib/array/float64' );
+*
+* var DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+* var D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+* var DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+*
+* var v = dlangt( 'M', 4, DL, 1, D, 1, DU, 1 );
+* // returns 7.0
+*
+* @example
+* var Float64Array = require( '@stdlib/array/float64' );
+*
+* var DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+* var D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+* var DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+*
+* var v = dlangt.ndarray( 'M', 4, DL, 1, 0, D, 1, 0, DU, 1, 0 );
+* // returns 7.0
+*/
+declare var dlangt: Routine;
+
+
+// EXPORTS //
+
+export = dlangt;
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/docs/types/test.ts b/lib/node_modules/@stdlib/lapack/base/dlangt/docs/types/test.ts
new file mode 100644
index 000000000000..695f267ced6d
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/docs/types/test.ts
@@ -0,0 +1,125 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import dlangt = require( './index' );
+
+
+// TESTS //
+
+// The function returns a number...
+{
+ const DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+ const D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+ const DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+
+ dlangt( 'M', 4, DL, 1, D, 1, DU, 1 ); // $ExpectType number
+}
+
+// The compiler throws an error if the function is provided a first argument which is not a string...
+{
+ const DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+ const D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+ const DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+
+ dlangt( 5, 4, DL, 1, D, 1, DU, 1 ); // $ExpectError
+ dlangt( true, 4, DL, 1, D, 1, DU, 1 ); // $ExpectError
+ dlangt( false, 4, DL, 1, D, 1, DU, 1 ); // $ExpectError
+ dlangt( null, 4, DL, 1, D, 1, DU, 1 ); // $ExpectError
+ dlangt( void 0, 4, DL, 1, D, 1, DU, 1 ); // $ExpectError
+ dlangt( [], 4, DL, 1, D, 1, DU, 1 ); // $ExpectError
+ dlangt( {}, 4, DL, 1, D, 1, DU, 1 ); // $ExpectError
+ dlangt( ( x: number ): number => x, 4, DL, 1, D, 1, DU, 1 ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided a second argument which is not a number...
+{
+ const DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+ const D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+ const DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+
+ dlangt( 'M', '4', DL, 1, D, 1, DU, 1 ); // $ExpectError
+ dlangt( 'M', true, DL, 1, D, 1, DU, 1 ); // $ExpectError
+ dlangt( 'M', false, DL, 1, D, 1, DU, 1 ); // $ExpectError
+ dlangt( 'M', null, DL, 1, D, 1, DU, 1 ); // $ExpectError
+ dlangt( 'M', void 0, DL, 1, D, 1, DU, 1 ); // $ExpectError
+ dlangt( 'M', [], DL, 1, D, 1, DU, 1 ); // $ExpectError
+ dlangt( 'M', {}, DL, 1, D, 1, DU, 1 ); // $ExpectError
+ dlangt( 'M', ( x: number ): number => x, DL, 1, D, 1, DU, 1 ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an unsupported number of arguments...
+{
+ const DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+ const D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+ const DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+
+ dlangt(); // $ExpectError
+ dlangt( 'M' ); // $ExpectError
+ dlangt( 'M', 4 ); // $ExpectError
+ dlangt( 'M', 4, DL ); // $ExpectError
+ dlangt( 'M', 4, DL, 1 ); // $ExpectError
+ dlangt( 'M', 4, DL, 1, D ); // $ExpectError
+ dlangt( 'M', 4, DL, 1, D, 1 ); // $ExpectError
+ dlangt( 'M', 4, DL, 1, D, 1, DU ); // $ExpectError
+ dlangt( 'M', 4, DL, 1, D, 1, DU, 1, 10 ); // $ExpectError
+}
+
+// Attached to main export is an `ndarray` method which returns a number...
+{
+ const DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+ const D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+ const DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+
+ dlangt.ndarray( 'M', 4, DL, 1, 0, D, 1, 0, DU, 1, 0 ); // $ExpectType number
+}
+
+// The compiler throws an error if the `ndarray` method is provided a first argument which is not a string...
+{
+ const DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+ const D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+ const DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+
+ dlangt.ndarray( 5, 4, DL, 1, 0, D, 1, 0, DU, 1, 0 ); // $ExpectError
+ dlangt.ndarray( true, 4, DL, 1, 0, D, 1, 0, DU, 1, 0 ); // $ExpectError
+ dlangt.ndarray( false, 4, DL, 1, 0, D, 1, 0, DU, 1, 0 ); // $ExpectError
+ dlangt.ndarray( null, 4, DL, 1, 0, D, 1, 0, DU, 1, 0 ); // $ExpectError
+ dlangt.ndarray( void 0, 4, DL, 1, 0, D, 1, 0, DU, 1, 0 ); // $ExpectError
+ dlangt.ndarray( [], 4, DL, 1, 0, D, 1, 0, DU, 1, 0 ); // $ExpectError
+ dlangt.ndarray( {}, 4, DL, 1, 0, D, 1, 0, DU, 1, 0 ); // $ExpectError
+ dlangt.ndarray( ( x: number ): number => x, 4, DL, 1, 0, D, 1, 0, DU, 1, 0 ); // $ExpectError
+}
+
+// The compiler throws an error if the `ndarray` method is provided an unsupported number of arguments...
+{
+ const DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+ const D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+ const DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+
+ dlangt.ndarray(); // $ExpectError
+ dlangt.ndarray( 'M' ); // $ExpectError
+ dlangt.ndarray( 'M', 4 ); // $ExpectError
+ dlangt.ndarray( 'M', 4, DL ); // $ExpectError
+ dlangt.ndarray( 'M', 4, DL, 1 ); // $ExpectError
+ dlangt.ndarray( 'M', 4, DL, 1, 0 ); // $ExpectError
+ dlangt.ndarray( 'M', 4, DL, 1, 0, D ); // $ExpectError
+ dlangt.ndarray( 'M', 4, DL, 1, 0, D, 1 ); // $ExpectError
+ dlangt.ndarray( 'M', 4, DL, 1, 0, D, 1, 0 ); // $ExpectError
+ dlangt.ndarray( 'M', 4, DL, 1, 0, D, 1, 0, DU ); // $ExpectError
+ dlangt.ndarray( 'M', 4, DL, 1, 0, D, 1, 0, DU, 1 ); // $ExpectError
+ dlangt.ndarray( 'M', 4, DL, 1, 0, D, 1, 0, DU, 1, 0, 10 ); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/examples/index.js b/lib/node_modules/@stdlib/lapack/base/dlangt/examples/index.js
new file mode 100644
index 000000000000..60f10d7f6cb1
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/examples/index.js
@@ -0,0 +1,38 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+var Float64Array = require( '@stdlib/array/float64' );
+var dlangt = require( './../lib' );
+
+var DL = new Float64Array( [ 3.0, -2.0, 1.0, 4.0 ] );
+var D = new Float64Array( [ -1.0, 5.0, -3.0, 2.0, 7.0 ] );
+var DU = new Float64Array( [ 2.0, -1.0, 4.0, -3.0 ] );
+
+// Max absolute value:
+console.log( 'Max norm:', dlangt( 'M', 5, DL, 1, D, 1, DU, 1 ) );
+
+// One norm (max column sum):
+console.log( 'One norm:', dlangt( '1', 5, DL, 1, D, 1, DU, 1 ) );
+
+// Infinity norm (max row sum):
+console.log( 'Infinity norm:', dlangt( 'I', 5, DL, 1, D, 1, DU, 1 ) );
+
+// Frobenius norm:
+console.log( 'Frobenius norm:', dlangt( 'F', 5, DL, 1, D, 1, DU, 1 ) );
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/lib/base.js b/lib/node_modules/@stdlib/lapack/base/dlangt/lib/base.js
new file mode 100644
index 000000000000..05550aa26bfa
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/lib/base.js
@@ -0,0 +1,158 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+/* eslint-disable max-len, max-params */
+
+'use strict';
+
+// MODULES //
+
+var abs = require( '@stdlib/math/base/special/abs' );
+var sqrt = require( '@stdlib/math/base/special/sqrt' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var Float64Array = require( '@stdlib/array/float64' );
+var dlassq = require( '@stdlib/lapack/base/dlassq' ).ndarray;
+
+
+// MAIN //
+
+/**
+* Returns the value of the one-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a real tridiagonal matrix `A`.
+*
+* @private
+* @param {string} norm - specifies the norm: 'M' (max abs), '1'/'O' (one-norm), 'I' (infinity-norm), 'F'/'E' (Frobenius)
+* @param {NonNegativeInteger} N - order of the matrix
+* @param {Float64Array} DL - sub-diagonal elements (length N-1)
+* @param {integer} strideDL - stride length for `DL`
+* @param {NonNegativeInteger} offsetDL - starting index for `DL`
+* @param {Float64Array} D - diagonal elements (length N)
+* @param {integer} strideD - stride length for `D`
+* @param {NonNegativeInteger} offsetD - starting index for `D`
+* @param {Float64Array} DU - super-diagonal elements (length N-1)
+* @param {integer} strideDU - stride length for `DU`
+* @param {NonNegativeInteger} offsetDU - starting index for `DU`
+* @returns {number} matrix norm
+*
+* @example
+* var Float64Array = require( '@stdlib/array/float64' );
+*
+* var DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+* var D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+* var DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+*
+* var norm = dlangt( 'M', 4, DL, 1, 0, D, 1, 0, DU, 1, 0 );
+* // returns 7.0
+*/
+function dlangt( norm, N, DL, strideDL, offsetDL, D, strideD, offsetD, DU, strideDU, offsetDU ) {
+ var anorm;
+ var scale;
+ var sumsq;
+ var temp;
+ var out;
+ var odl;
+ var odu;
+ var od;
+ var i;
+
+ if ( N <= 0 ) {
+ return 0.0;
+ }
+ odl = offsetDL;
+ od = offsetD;
+ odu = offsetDU;
+
+ if ( norm === 'M' || norm === 'm' ) {
+ // Find max(abs(A(i,j)))
+ anorm = abs( D[ od + ( ( N - 1 ) * strideD ) ] );
+ for ( i = 0; i < N - 1; i++ ) {
+ temp = abs( DL[ odl + ( i * strideDL ) ] );
+ if ( anorm < temp || isnan( temp ) ) {
+ anorm = temp;
+ }
+ temp = abs( D[ od + ( i * strideD ) ] );
+ if ( anorm < temp || isnan( temp ) ) {
+ anorm = temp;
+ }
+ temp = abs( DU[ odu + ( i * strideDU ) ] );
+ if ( anorm < temp || isnan( temp ) ) {
+ anorm = temp;
+ }
+ }
+ } else if ( norm === 'O' || norm === 'o' || norm === '1' ) {
+ // Find norm1(A) = max column sum
+ if ( N === 1 ) {
+ anorm = abs( D[ od ] );
+ } else {
+ // First column: D[0] + DL[0]
+ anorm = abs( D[ od ] ) + abs( DL[ odl ] );
+
+ // Last column: D[N-1] + DU[N-2]
+ temp = abs( D[ od + ( ( N - 1 ) * strideD ) ] ) + abs( DU[ odu + ( ( N - 2 ) * strideDU ) ] );
+ if ( anorm < temp || isnan( temp ) ) {
+ anorm = temp;
+ }
+
+ // Middle columns: D[i] + DL[i] + DU[i-1]
+ for ( i = 1; i < N - 1; i++ ) {
+ temp = abs( D[ od + ( i * strideD ) ] ) + abs( DL[ odl + ( i * strideDL ) ] ) + abs( DU[ odu + ( ( i - 1 ) * strideDU ) ] );
+ if ( anorm < temp || isnan( temp ) ) {
+ anorm = temp;
+ }
+ }
+ }
+ } else if ( norm === 'I' || norm === 'i' ) {
+ // Find normI(A) = max row sum
+ if ( N === 1 ) {
+ anorm = abs( D[ od ] );
+ } else {
+ // First row: D[0] + DU[0]
+ anorm = abs( D[ od ] ) + abs( DU[ odu ] );
+
+ // Last row: D[N-1] + DL[N-2]
+ temp = abs( D[ od + ( ( N - 1 ) * strideD ) ] ) + abs( DL[ odl + ( ( N - 2 ) * strideDL ) ] );
+ if ( anorm < temp || isnan( temp ) ) {
+ anorm = temp;
+ }
+
+ // Middle rows: D[i] + DU[i] + DL[i-1]
+ for ( i = 1; i < N - 1; i++ ) {
+ temp = abs( D[ od + ( i * strideD ) ] ) + abs( DU[ odu + ( i * strideDU ) ] ) + abs( DL[ odl + ( ( i - 1 ) * strideDL ) ] );
+ if ( anorm < temp || isnan( temp ) ) {
+ anorm = temp;
+ }
+ }
+ }
+ } else if ( norm === 'F' || norm === 'f' || norm === 'E' || norm === 'e' ) {
+ // Find normF(A) = Frobenius norm
+ out = new Float64Array( 2 );
+ scale = 0.0;
+ sumsq = 1.0;
+ dlassq( N, D, strideD, offsetD, scale, sumsq, out, 1, 0 );
+ if ( N > 1 ) {
+ dlassq( N - 1, DL, strideDL, offsetDL, out[ 0 ], out[ 1 ], out, 1, 0 );
+ dlassq( N - 1, DU, strideDU, offsetDU, out[ 0 ], out[ 1 ], out, 1, 0 );
+ }
+ anorm = out[ 0 ] * sqrt( out[ 1 ] );
+ }
+ return anorm;
+}
+
+
+// EXPORTS //
+
+module.exports = dlangt;
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/lib/dlangt.js b/lib/node_modules/@stdlib/lapack/base/dlangt/lib/dlangt.js
new file mode 100644
index 000000000000..e62eff196117
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/lib/dlangt.js
@@ -0,0 +1,72 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var stride2offset = require( '@stdlib/strided/base/stride2offset' );
+var format = require( '@stdlib/string/format' );
+var base = require( './base.js' );
+
+
+// VARIABLES //
+
+var NORMS = [ 'M', 'm', '1', 'O', 'o', 'I', 'i', 'F', 'f', 'E', 'e' ];
+
+
+// MAIN //
+
+/**
+* Returns the value of the one-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a real tridiagonal matrix `A`.
+*
+* @param {string} norm - specifies the norm type
+* @param {NonNegativeInteger} N - order of the matrix
+* @param {Float64Array} DL - sub-diagonal elements (length N-1)
+* @param {integer} strideDL - stride length for `DL`
+* @param {Float64Array} D - diagonal elements (length N)
+* @param {integer} strideD - stride length for `D`
+* @param {Float64Array} DU - super-diagonal elements (length N-1)
+* @param {integer} strideDU - stride length for `DU`
+* @throws {TypeError} first argument must be a valid norm type
+* @returns {number} matrix norm
+*
+* @example
+* var Float64Array = require( '@stdlib/array/float64' );
+*
+* var DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+* var D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+* var DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+*
+* var norm = dlangt( 'M', 4, DL, 1, D, 1, DU, 1 );
+* // returns 7.0
+*/
+function dlangt( norm, N, DL, strideDL, D, strideD, DU, strideDU ) {
+ if ( NORMS.indexOf( norm ) === -1 ) {
+ throw new TypeError( format( 'invalid argument. First argument must be a valid norm type. Value: `%s`.', norm ) );
+ }
+ if ( N <= 0 ) {
+ return 0.0;
+ }
+ return base( norm, N, DL, strideDL, stride2offset( N - 1, strideDL ), D, strideD, stride2offset( N, strideD ), DU, strideDU, stride2offset( N - 1, strideDU ) );
+}
+
+
+// EXPORTS //
+
+module.exports = dlangt;
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/lib/index.js b/lib/node_modules/@stdlib/lapack/base/dlangt/lib/index.js
new file mode 100644
index 000000000000..533b39867454
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/lib/index.js
@@ -0,0 +1,72 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+/**
+* LAPACK routine to return the value of the one-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a real tridiagonal matrix.
+*
+* @module @stdlib/lapack/base/dlangt
+*
+* @example
+* var Float64Array = require( '@stdlib/array/float64' );
+* var dlangt = require( '@stdlib/lapack/base/dlangt' );
+*
+* var DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+* var D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+* var DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+*
+* var norm = dlangt( 'M', 4, DL, 1, D, 1, DU, 1 );
+* // returns 7.0
+*
+* @example
+* var Float64Array = require( '@stdlib/array/float64' );
+* var dlangt = require( '@stdlib/lapack/base/dlangt' );
+*
+* var DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+* var D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+* var DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+*
+* var norm = dlangt.ndarray( 'M', 4, DL, 1, 0, D, 1, 0, DU, 1, 0 );
+* // returns 7.0
+*/
+
+// MODULES //
+
+var join = require( 'path' ).join;
+var tryRequire = require( '@stdlib/utils/try-require' );
+var isError = require( '@stdlib/assert/is-error' );
+var main = require( './main.js' );
+
+
+// MAIN //
+
+var dlangt;
+var tmp = tryRequire( join( __dirname, './native.js' ) );
+if ( isError( tmp ) ) {
+ dlangt = main;
+} else {
+ dlangt = tmp;
+}
+
+
+// EXPORTS //
+
+module.exports = dlangt;
+
+// exports: { "ndarray": "dlangt.ndarray" }
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/lib/main.js b/lib/node_modules/@stdlib/lapack/base/dlangt/lib/main.js
new file mode 100644
index 000000000000..d7eb017692b9
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/lib/main.js
@@ -0,0 +1,35 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var setReadOnly = require( '@stdlib/utils/define-nonenumerable-read-only-property' );
+var dlangt = require( './dlangt.js' );
+var ndarray = require( './ndarray.js' );
+
+
+// MAIN //
+
+setReadOnly( dlangt, 'ndarray', ndarray );
+
+
+// EXPORTS //
+
+module.exports = dlangt;
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/lib/ndarray.js b/lib/node_modules/@stdlib/lapack/base/dlangt/lib/ndarray.js
new file mode 100644
index 000000000000..d108cc9de263
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/lib/ndarray.js
@@ -0,0 +1,73 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+/* eslint-disable max-params */
+
+'use strict';
+
+// MODULES //
+
+var format = require( '@stdlib/string/format' );
+var base = require( './base.js' );
+
+
+// VARIABLES //
+
+var NORMS = ['M', 'm', '1', 'O', 'o', 'I', 'i', 'F', 'f', 'E', 'e'];
+
+
+// MAIN //
+
+/**
+* Returns the value of the one-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a real tridiagonal matrix `A` using alternative indexing semantics.
+*
+* @param {string} norm - specifies the norm type
+* @param {NonNegativeInteger} N - order of the matrix
+* @param {Float64Array} DL - sub-diagonal elements (length N-1)
+* @param {integer} strideDL - stride length for `DL`
+* @param {NonNegativeInteger} offsetDL - starting index for `DL`
+* @param {Float64Array} D - diagonal elements (length N)
+* @param {integer} strideD - stride length for `D`
+* @param {NonNegativeInteger} offsetD - starting index for `D`
+* @param {Float64Array} DU - super-diagonal elements (length N-1)
+* @param {integer} strideDU - stride length for `DU`
+* @param {NonNegativeInteger} offsetDU - starting index for `DU`
+* @throws {TypeError} first argument must be a valid norm type
+* @returns {number} matrix norm
+*
+* @example
+* var Float64Array = require( '@stdlib/array/float64' );
+*
+* var DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+* var D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+* var DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+*
+* var norm = dlangt( 'M', 4, DL, 1, 0, D, 1, 0, DU, 1, 0 );
+* // returns 7.0
+*/
+function dlangt( norm, N, DL, strideDL, offsetDL, D, strideD, offsetD, DU, strideDU, offsetDU ) {
+ if ( NORMS.indexOf( norm ) === -1 ) {
+ throw new TypeError( format( 'invalid argument. First argument must be a valid norm type. Value: `%s`.', norm ) );
+ }
+ return base( norm, N, DL, strideDL, offsetDL, D, strideD, offsetD, DU, strideDU, offsetDU );
+}
+
+
+// EXPORTS //
+
+module.exports = dlangt;
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/package.json b/lib/node_modules/@stdlib/lapack/base/dlangt/package.json
new file mode 100644
index 000000000000..570a8bb1c8c0
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/package.json
@@ -0,0 +1,73 @@
+{
+ "name": "@stdlib/lapack/base/dlangt",
+ "version": "0.0.0",
+ "description": "Return the value of the one-norm, Frobenius norm, infinity-norm, or the largest absolute value of any element of a real tridiagonal matrix.",
+ "license": "Apache-2.0",
+ "author": {
+ "name": "The Stdlib Authors",
+ "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+ },
+ "contributors": [
+ {
+ "name": "The Stdlib Authors",
+ "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+ }
+ ],
+ "main": "./lib",
+ "directories": {
+ "benchmark": "./benchmark",
+ "doc": "./docs",
+ "example": "./examples",
+ "lib": "./lib",
+ "test": "./test"
+ },
+ "types": "./docs/types",
+ "scripts": {},
+ "homepage": "https://github.com/stdlib-js/stdlib",
+ "repository": {
+ "type": "git",
+ "url": "git://github.com/stdlib-js/stdlib.git"
+ },
+ "bugs": {
+ "url": "https://github.com/stdlib-js/stdlib/issues"
+ },
+ "dependencies": {},
+ "devDependencies": {},
+ "engines": {
+ "node": ">=0.10.0",
+ "npm": ">2.7.0"
+ },
+ "os": [
+ "aix",
+ "darwin",
+ "freebsd",
+ "linux",
+ "macos",
+ "openbsd",
+ "sunos",
+ "win32",
+ "windows"
+ ],
+ "keywords": [
+ "stdlib",
+ "stdmath",
+ "mathematics",
+ "math",
+ "lapack",
+ "dlangt",
+ "norm",
+ "matrix",
+ "tridiagonal",
+ "one-norm",
+ "frobenius",
+ "infinity-norm",
+ "linear",
+ "algebra",
+ "subroutines",
+ "array",
+ "ndarray",
+ "float64",
+ "double",
+ "float64array"
+ ]
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/frobenius_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/frobenius_norm.json
new file mode 100644
index 000000000000..905ed1ab5788
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/frobenius_norm.json
@@ -0,0 +1,30 @@
+{
+ "norm": "F",
+ "N": 5,
+ "DL": [
+ 3,
+ -2,
+ 1,
+ 4
+ ],
+ "strideDL": 1,
+ "offsetDL": 0,
+ "D": [
+ -1,
+ 5,
+ -3,
+ 2,
+ 7
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ 2,
+ -1,
+ 4,
+ -3
+ ],
+ "strideDU": 1,
+ "offsetDU": 0,
+ "expected": 12.165525060596439
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/inf_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/inf_norm.json
new file mode 100644
index 000000000000..925078a6b911
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/inf_norm.json
@@ -0,0 +1,30 @@
+{
+ "norm": "I",
+ "N": 5,
+ "DL": [
+ 3,
+ -2,
+ 1,
+ 4
+ ],
+ "strideDL": 1,
+ "offsetDL": 0,
+ "D": [
+ -1,
+ 5,
+ -3,
+ 2,
+ 7
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ 2,
+ -1,
+ 4,
+ -3
+ ],
+ "strideDU": 1,
+ "offsetDU": 0,
+ "expected": 11
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_frobenius_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_frobenius_norm.json
new file mode 100644
index 000000000000..bcfe4972a9c3
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_frobenius_norm.json
@@ -0,0 +1,45 @@
+{
+ "norm": "F",
+ "N": 10,
+ "DL": [
+ 1,
+ -2,
+ 3,
+ -4,
+ 5,
+ -6,
+ 7,
+ -8,
+ 9
+ ],
+ "strideDL": 1,
+ "offsetDL": 0,
+ "D": [
+ 10,
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ -1,
+ 2,
+ -3,
+ 4,
+ -5,
+ 6,
+ -7,
+ 8,
+ -9
+ ],
+ "strideDU": 1,
+ "offsetDU": 0,
+ "expected": 30.903074280724887
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_inf_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_inf_norm.json
new file mode 100644
index 000000000000..e832f28d0780
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_inf_norm.json
@@ -0,0 +1,45 @@
+{
+ "norm": "I",
+ "N": 10,
+ "DL": [
+ 1,
+ -2,
+ 3,
+ -4,
+ 5,
+ -6,
+ 7,
+ -8,
+ 9
+ ],
+ "strideDL": 1,
+ "offsetDL": 0,
+ "D": [
+ 10,
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ -1,
+ 2,
+ -3,
+ 4,
+ -5,
+ 6,
+ -7,
+ 8,
+ -9
+ ],
+ "strideDU": 1,
+ "offsetDU": 0,
+ "expected": 19
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_n.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_n.json
new file mode 100644
index 000000000000..2f607e1a55ed
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_n.json
@@ -0,0 +1,45 @@
+{
+ "norm": "M",
+ "N": 10,
+ "DL": [
+ 1,
+ -2,
+ 3,
+ -4,
+ 5,
+ -6,
+ 7,
+ -8,
+ 9
+ ],
+ "strideDL": 1,
+ "offsetDL": 0,
+ "D": [
+ 10,
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ -1,
+ 2,
+ -3,
+ 4,
+ -5,
+ 6,
+ -7,
+ 8,
+ -9
+ ],
+ "strideDU": 1,
+ "offsetDU": 0,
+ "expected": 10
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_one_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_one_norm.json
new file mode 100644
index 000000000000..4568a6a4d889
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_one_norm.json
@@ -0,0 +1,45 @@
+{
+ "norm": "1",
+ "N": 10,
+ "DL": [
+ 1,
+ -2,
+ 3,
+ -4,
+ 5,
+ -6,
+ 7,
+ -8,
+ 9
+ ],
+ "strideDL": 1,
+ "offsetDL": 0,
+ "D": [
+ 10,
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ -1,
+ 2,
+ -3,
+ 4,
+ -5,
+ 6,
+ -7,
+ 8,
+ -9
+ ],
+ "strideDU": 1,
+ "offsetDU": 0,
+ "expected": 19
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/frobenius_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/frobenius_norm.json
new file mode 100644
index 000000000000..e08164d4f1e3
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/frobenius_norm.json
@@ -0,0 +1,43 @@
+{
+ "norm": "F",
+ "N": 5,
+ "DL": [
+ 3,
+ 9999,
+ -2,
+ 9999,
+ 1,
+ 9999,
+ 4,
+ 9999
+ ],
+ "strideDL": 2,
+ "offsetDL": 0,
+ "D": [
+ -1,
+ 9999,
+ 5,
+ 9999,
+ -3,
+ 9999,
+ 2,
+ 9999,
+ 7,
+ 9999
+ ],
+ "strideD": 2,
+ "offsetD": 0,
+ "DU": [
+ 2,
+ 9999,
+ -1,
+ 9999,
+ 4,
+ 9999,
+ -3,
+ 9999
+ ],
+ "strideDU": 2,
+ "offsetDU": 0,
+ "expected": 12.165525060596439
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/inf_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/inf_norm.json
new file mode 100644
index 000000000000..dc77ccbbbad1
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/inf_norm.json
@@ -0,0 +1,43 @@
+{
+ "norm": "I",
+ "N": 5,
+ "DL": [
+ 3,
+ 9999,
+ -2,
+ 9999,
+ 1,
+ 9999,
+ 4,
+ 9999
+ ],
+ "strideDL": 2,
+ "offsetDL": 0,
+ "D": [
+ -1,
+ 9999,
+ 5,
+ 9999,
+ -3,
+ 9999,
+ 2,
+ 9999,
+ 7,
+ 9999
+ ],
+ "strideD": 2,
+ "offsetD": 0,
+ "DU": [
+ 2,
+ 9999,
+ -1,
+ 9999,
+ 4,
+ 9999,
+ -3,
+ 9999
+ ],
+ "strideDU": 2,
+ "offsetDU": 0,
+ "expected": 11
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/large_frobenius_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/large_frobenius_norm.json
new file mode 100644
index 000000000000..975bdf6489c3
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/large_frobenius_norm.json
@@ -0,0 +1,73 @@
+{
+ "norm": "F",
+ "N": 10,
+ "DL": [
+ 1,
+ 9999,
+ -2,
+ 9999,
+ 3,
+ 9999,
+ -4,
+ 9999,
+ 5,
+ 9999,
+ -6,
+ 9999,
+ 7,
+ 9999,
+ -8,
+ 9999,
+ 9,
+ 9999
+ ],
+ "strideDL": 2,
+ "offsetDL": 0,
+ "D": [
+ 10,
+ 9999,
+ -9,
+ 9999,
+ 8,
+ 9999,
+ -7,
+ 9999,
+ 6,
+ 9999,
+ -5,
+ 9999,
+ 4,
+ 9999,
+ -3,
+ 9999,
+ 2,
+ 9999,
+ -1,
+ 9999
+ ],
+ "strideD": 2,
+ "offsetD": 0,
+ "DU": [
+ -1,
+ 9999,
+ 2,
+ 9999,
+ -3,
+ 9999,
+ 4,
+ 9999,
+ -5,
+ 9999,
+ 6,
+ 9999,
+ -7,
+ 9999,
+ 8,
+ 9999,
+ -9,
+ 9999
+ ],
+ "strideDU": 2,
+ "offsetDU": 0,
+ "expected": 30.903074280724887
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/large_inf_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/large_inf_norm.json
new file mode 100644
index 000000000000..5a7ea553e908
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/large_inf_norm.json
@@ -0,0 +1,73 @@
+{
+ "norm": "I",
+ "N": 10,
+ "DL": [
+ 1,
+ 9999,
+ -2,
+ 9999,
+ 3,
+ 9999,
+ -4,
+ 9999,
+ 5,
+ 9999,
+ -6,
+ 9999,
+ 7,
+ 9999,
+ -8,
+ 9999,
+ 9,
+ 9999
+ ],
+ "strideDL": 2,
+ "offsetDL": 0,
+ "D": [
+ 10,
+ 9999,
+ -9,
+ 9999,
+ 8,
+ 9999,
+ -7,
+ 9999,
+ 6,
+ 9999,
+ -5,
+ 9999,
+ 4,
+ 9999,
+ -3,
+ 9999,
+ 2,
+ 9999,
+ -1,
+ 9999
+ ],
+ "strideD": 2,
+ "offsetD": 0,
+ "DU": [
+ -1,
+ 9999,
+ 2,
+ 9999,
+ -3,
+ 9999,
+ 4,
+ 9999,
+ -5,
+ 9999,
+ 6,
+ 9999,
+ -7,
+ 9999,
+ 8,
+ 9999,
+ -9,
+ 9999
+ ],
+ "strideDU": 2,
+ "offsetDU": 0,
+ "expected": 19
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/large_n.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/large_n.json
new file mode 100644
index 000000000000..679232198bc7
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/large_n.json
@@ -0,0 +1,73 @@
+{
+ "norm": "M",
+ "N": 10,
+ "DL": [
+ 1,
+ 9999,
+ -2,
+ 9999,
+ 3,
+ 9999,
+ -4,
+ 9999,
+ 5,
+ 9999,
+ -6,
+ 9999,
+ 7,
+ 9999,
+ -8,
+ 9999,
+ 9,
+ 9999
+ ],
+ "strideDL": 2,
+ "offsetDL": 0,
+ "D": [
+ 10,
+ 9999,
+ -9,
+ 9999,
+ 8,
+ 9999,
+ -7,
+ 9999,
+ 6,
+ 9999,
+ -5,
+ 9999,
+ 4,
+ 9999,
+ -3,
+ 9999,
+ 2,
+ 9999,
+ -1,
+ 9999
+ ],
+ "strideD": 2,
+ "offsetD": 0,
+ "DU": [
+ -1,
+ 9999,
+ 2,
+ 9999,
+ -3,
+ 9999,
+ 4,
+ 9999,
+ -5,
+ 9999,
+ 6,
+ 9999,
+ -7,
+ 9999,
+ 8,
+ 9999,
+ -9,
+ 9999
+ ],
+ "strideDU": 2,
+ "offsetDU": 0,
+ "expected": 10
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/large_one_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/large_one_norm.json
new file mode 100644
index 000000000000..f603888707ac
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/large_one_norm.json
@@ -0,0 +1,73 @@
+{
+ "norm": "1",
+ "N": 10,
+ "DL": [
+ 1,
+ 9999,
+ -2,
+ 9999,
+ 3,
+ 9999,
+ -4,
+ 9999,
+ 5,
+ 9999,
+ -6,
+ 9999,
+ 7,
+ 9999,
+ -8,
+ 9999,
+ 9,
+ 9999
+ ],
+ "strideDL": 2,
+ "offsetDL": 0,
+ "D": [
+ 10,
+ 9999,
+ -9,
+ 9999,
+ 8,
+ 9999,
+ -7,
+ 9999,
+ 6,
+ 9999,
+ -5,
+ 9999,
+ 4,
+ 9999,
+ -3,
+ 9999,
+ 2,
+ 9999,
+ -1,
+ 9999
+ ],
+ "strideD": 2,
+ "offsetD": 0,
+ "DU": [
+ -1,
+ 9999,
+ 2,
+ 9999,
+ -3,
+ 9999,
+ 4,
+ 9999,
+ -5,
+ 9999,
+ 6,
+ 9999,
+ -7,
+ 9999,
+ 8,
+ 9999,
+ -9,
+ 9999
+ ],
+ "strideDU": 2,
+ "offsetDU": 0,
+ "expected": 19
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/max_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/max_norm.json
new file mode 100644
index 000000000000..6529bd20d3da
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/max_norm.json
@@ -0,0 +1,43 @@
+{
+ "norm": "M",
+ "N": 5,
+ "DL": [
+ 3,
+ 9999,
+ -2,
+ 9999,
+ 1,
+ 9999,
+ 4,
+ 9999
+ ],
+ "strideDL": 2,
+ "offsetDL": 0,
+ "D": [
+ -1,
+ 9999,
+ 5,
+ 9999,
+ -3,
+ 9999,
+ 2,
+ 9999,
+ 7,
+ 9999
+ ],
+ "strideD": 2,
+ "offsetD": 0,
+ "DU": [
+ 2,
+ 9999,
+ -1,
+ 9999,
+ 4,
+ 9999,
+ -3,
+ 9999
+ ],
+ "strideDU": 2,
+ "offsetDU": 0,
+ "expected": 7
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/n_equals_one.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/n_equals_one.json
new file mode 100644
index 000000000000..3026f14c2762
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/n_equals_one.json
@@ -0,0 +1,17 @@
+{
+ "norm": "M",
+ "N": 1,
+ "DL": [],
+ "strideDL": 2,
+ "offsetDL": 0,
+ "D": [
+ 42,
+ 9999
+ ],
+ "strideD": 2,
+ "offsetD": 0,
+ "DU": [],
+ "strideDU": 2,
+ "offsetDU": 0,
+ "expected": 42
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/one_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/one_norm.json
new file mode 100644
index 000000000000..9bf5671fa654
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/large_strides/one_norm.json
@@ -0,0 +1,43 @@
+{
+ "norm": "1",
+ "N": 5,
+ "DL": [
+ 3,
+ 9999,
+ -2,
+ 9999,
+ 1,
+ 9999,
+ 4,
+ 9999
+ ],
+ "strideDL": 2,
+ "offsetDL": 0,
+ "D": [
+ -1,
+ 9999,
+ 5,
+ 9999,
+ -3,
+ 9999,
+ 2,
+ 9999,
+ 7,
+ 9999
+ ],
+ "strideD": 2,
+ "offsetD": 0,
+ "DU": [
+ 2,
+ 9999,
+ -1,
+ 9999,
+ 4,
+ 9999,
+ -3,
+ 9999
+ ],
+ "strideDU": 2,
+ "offsetDU": 0,
+ "expected": 10
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/max_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/max_norm.json
new file mode 100644
index 000000000000..8509aecc0b93
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/max_norm.json
@@ -0,0 +1,30 @@
+{
+ "norm": "M",
+ "N": 5,
+ "DL": [
+ 3,
+ -2,
+ 1,
+ 4
+ ],
+ "strideDL": 1,
+ "offsetDL": 0,
+ "D": [
+ -1,
+ 5,
+ -3,
+ 2,
+ 7
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ 2,
+ -1,
+ 4,
+ -3
+ ],
+ "strideDU": 1,
+ "offsetDU": 0,
+ "expected": 7
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/frobenius_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/frobenius_norm.json
new file mode 100644
index 000000000000..aaa6f921cc2d
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/frobenius_norm.json
@@ -0,0 +1,30 @@
+{
+ "norm": "F",
+ "N": 5,
+ "DL": [
+ 4,
+ 1,
+ -2,
+ 3
+ ],
+ "strideDL": -1,
+ "offsetDL": 3,
+ "D": [
+ -1,
+ 5,
+ -3,
+ 2,
+ 7
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ -3,
+ 4,
+ -1,
+ 2
+ ],
+ "strideDU": -1,
+ "offsetDU": 3,
+ "expected": 12.165525060596439
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/inf_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/inf_norm.json
new file mode 100644
index 000000000000..3273c4528532
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/inf_norm.json
@@ -0,0 +1,30 @@
+{
+ "norm": "I",
+ "N": 5,
+ "DL": [
+ 4,
+ 1,
+ -2,
+ 3
+ ],
+ "strideDL": -1,
+ "offsetDL": 3,
+ "D": [
+ -1,
+ 5,
+ -3,
+ 2,
+ 7
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ -3,
+ 4,
+ -1,
+ 2
+ ],
+ "strideDU": -1,
+ "offsetDU": 3,
+ "expected": 11
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/large_frobenius_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/large_frobenius_norm.json
new file mode 100644
index 000000000000..596e7a7ee839
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/large_frobenius_norm.json
@@ -0,0 +1,45 @@
+{
+ "norm": "F",
+ "N": 10,
+ "DL": [
+ 9,
+ -8,
+ 7,
+ -6,
+ 5,
+ -4,
+ 3,
+ -2,
+ 1
+ ],
+ "strideDL": -1,
+ "offsetDL": 8,
+ "D": [
+ 10,
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideDU": -1,
+ "offsetDU": 8,
+ "expected": 30.903074280724887
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/large_inf_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/large_inf_norm.json
new file mode 100644
index 000000000000..ffcc67256cc5
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/large_inf_norm.json
@@ -0,0 +1,45 @@
+{
+ "norm": "I",
+ "N": 10,
+ "DL": [
+ 9,
+ -8,
+ 7,
+ -6,
+ 5,
+ -4,
+ 3,
+ -2,
+ 1
+ ],
+ "strideDL": -1,
+ "offsetDL": 8,
+ "D": [
+ 10,
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideDU": -1,
+ "offsetDU": 8,
+ "expected": 19
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/large_n.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/large_n.json
new file mode 100644
index 000000000000..30fc9123af59
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/large_n.json
@@ -0,0 +1,45 @@
+{
+ "norm": "M",
+ "N": 10,
+ "DL": [
+ 9,
+ -8,
+ 7,
+ -6,
+ 5,
+ -4,
+ 3,
+ -2,
+ 1
+ ],
+ "strideDL": -1,
+ "offsetDL": 8,
+ "D": [
+ 10,
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideDU": -1,
+ "offsetDU": 8,
+ "expected": 10
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/large_one_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/large_one_norm.json
new file mode 100644
index 000000000000..211390db1463
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/large_one_norm.json
@@ -0,0 +1,45 @@
+{
+ "norm": "1",
+ "N": 10,
+ "DL": [
+ 9,
+ -8,
+ 7,
+ -6,
+ 5,
+ -4,
+ 3,
+ -2,
+ 1
+ ],
+ "strideDL": -1,
+ "offsetDL": 8,
+ "D": [
+ 10,
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideDU": -1,
+ "offsetDU": 8,
+ "expected": 19
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/max_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/max_norm.json
new file mode 100644
index 000000000000..27381b306362
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/max_norm.json
@@ -0,0 +1,30 @@
+{
+ "norm": "M",
+ "N": 5,
+ "DL": [
+ 4,
+ 1,
+ -2,
+ 3
+ ],
+ "strideDL": -1,
+ "offsetDL": 3,
+ "D": [
+ -1,
+ 5,
+ -3,
+ 2,
+ 7
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ -3,
+ 4,
+ -1,
+ 2
+ ],
+ "strideDU": -1,
+ "offsetDU": 3,
+ "expected": 7
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/n_equals_one.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/n_equals_one.json
new file mode 100644
index 000000000000..2d0e1a8de4ac
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/n_equals_one.json
@@ -0,0 +1,16 @@
+{
+ "norm": "M",
+ "N": 1,
+ "DL": [],
+ "strideDL": 1,
+ "offsetDL": 0,
+ "D": [
+ 42
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [],
+ "strideDU": 1,
+ "offsetDU": 0,
+ "expected": 42
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/one_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/one_norm.json
new file mode 100644
index 000000000000..44215828bc79
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/mixed_strides/one_norm.json
@@ -0,0 +1,30 @@
+{
+ "norm": "1",
+ "N": 5,
+ "DL": [
+ 4,
+ 1,
+ -2,
+ 3
+ ],
+ "strideDL": -1,
+ "offsetDL": 3,
+ "D": [
+ -1,
+ 5,
+ -3,
+ 2,
+ 7
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ -3,
+ 4,
+ -1,
+ 2
+ ],
+ "strideDU": -1,
+ "offsetDU": 3,
+ "expected": 10
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/n_equals_one.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/n_equals_one.json
new file mode 100644
index 000000000000..2d0e1a8de4ac
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/n_equals_one.json
@@ -0,0 +1,16 @@
+{
+ "norm": "M",
+ "N": 1,
+ "DL": [],
+ "strideDL": 1,
+ "offsetDL": 0,
+ "D": [
+ 42
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [],
+ "strideDU": 1,
+ "offsetDU": 0,
+ "expected": 42
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/frobenius_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/frobenius_norm.json
new file mode 100644
index 000000000000..1eee4adc23d0
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/frobenius_norm.json
@@ -0,0 +1,30 @@
+{
+ "norm": "F",
+ "N": 5,
+ "DL": [
+ 4,
+ 1,
+ -2,
+ 3
+ ],
+ "strideDL": -1,
+ "offsetDL": 3,
+ "D": [
+ 7,
+ 2,
+ -3,
+ 5,
+ -1
+ ],
+ "strideD": -1,
+ "offsetD": 4,
+ "DU": [
+ -3,
+ 4,
+ -1,
+ 2
+ ],
+ "strideDU": -1,
+ "offsetDU": 3,
+ "expected": 12.165525060596439
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/inf_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/inf_norm.json
new file mode 100644
index 000000000000..c8f8ee3bf024
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/inf_norm.json
@@ -0,0 +1,30 @@
+{
+ "norm": "I",
+ "N": 5,
+ "DL": [
+ 4,
+ 1,
+ -2,
+ 3
+ ],
+ "strideDL": -1,
+ "offsetDL": 3,
+ "D": [
+ 7,
+ 2,
+ -3,
+ 5,
+ -1
+ ],
+ "strideD": -1,
+ "offsetD": 4,
+ "DU": [
+ -3,
+ 4,
+ -1,
+ 2
+ ],
+ "strideDU": -1,
+ "offsetDU": 3,
+ "expected": 11
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/large_frobenius_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/large_frobenius_norm.json
new file mode 100644
index 000000000000..33db45df8cfb
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/large_frobenius_norm.json
@@ -0,0 +1,45 @@
+{
+ "norm": "F",
+ "N": 10,
+ "DL": [
+ 9,
+ -8,
+ 7,
+ -6,
+ 5,
+ -4,
+ 3,
+ -2,
+ 1
+ ],
+ "strideDL": -1,
+ "offsetDL": 8,
+ "D": [
+ -1,
+ 2,
+ -3,
+ 4,
+ -5,
+ 6,
+ -7,
+ 8,
+ -9,
+ 10
+ ],
+ "strideD": -1,
+ "offsetD": 9,
+ "DU": [
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideDU": -1,
+ "offsetDU": 8,
+ "expected": 30.903074280724887
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/large_inf_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/large_inf_norm.json
new file mode 100644
index 000000000000..7945873e30b1
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/large_inf_norm.json
@@ -0,0 +1,45 @@
+{
+ "norm": "I",
+ "N": 10,
+ "DL": [
+ 9,
+ -8,
+ 7,
+ -6,
+ 5,
+ -4,
+ 3,
+ -2,
+ 1
+ ],
+ "strideDL": -1,
+ "offsetDL": 8,
+ "D": [
+ -1,
+ 2,
+ -3,
+ 4,
+ -5,
+ 6,
+ -7,
+ 8,
+ -9,
+ 10
+ ],
+ "strideD": -1,
+ "offsetD": 9,
+ "DU": [
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideDU": -1,
+ "offsetDU": 8,
+ "expected": 19
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/large_n.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/large_n.json
new file mode 100644
index 000000000000..e17688750f7b
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/large_n.json
@@ -0,0 +1,45 @@
+{
+ "norm": "M",
+ "N": 10,
+ "DL": [
+ 9,
+ -8,
+ 7,
+ -6,
+ 5,
+ -4,
+ 3,
+ -2,
+ 1
+ ],
+ "strideDL": -1,
+ "offsetDL": 8,
+ "D": [
+ -1,
+ 2,
+ -3,
+ 4,
+ -5,
+ 6,
+ -7,
+ 8,
+ -9,
+ 10
+ ],
+ "strideD": -1,
+ "offsetD": 9,
+ "DU": [
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideDU": -1,
+ "offsetDU": 8,
+ "expected": 10
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/large_one_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/large_one_norm.json
new file mode 100644
index 000000000000..1c5ac1e8aa37
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/large_one_norm.json
@@ -0,0 +1,45 @@
+{
+ "norm": "1",
+ "N": 10,
+ "DL": [
+ 9,
+ -8,
+ 7,
+ -6,
+ 5,
+ -4,
+ 3,
+ -2,
+ 1
+ ],
+ "strideDL": -1,
+ "offsetDL": 8,
+ "D": [
+ -1,
+ 2,
+ -3,
+ 4,
+ -5,
+ 6,
+ -7,
+ 8,
+ -9,
+ 10
+ ],
+ "strideD": -1,
+ "offsetD": 9,
+ "DU": [
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideDU": -1,
+ "offsetDU": 8,
+ "expected": 19
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/max_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/max_norm.json
new file mode 100644
index 000000000000..2049c55321d6
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/max_norm.json
@@ -0,0 +1,30 @@
+{
+ "norm": "M",
+ "N": 5,
+ "DL": [
+ 4,
+ 1,
+ -2,
+ 3
+ ],
+ "strideDL": -1,
+ "offsetDL": 3,
+ "D": [
+ 7,
+ 2,
+ -3,
+ 5,
+ -1
+ ],
+ "strideD": -1,
+ "offsetD": 4,
+ "DU": [
+ -3,
+ 4,
+ -1,
+ 2
+ ],
+ "strideDU": -1,
+ "offsetDU": 3,
+ "expected": 7
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/n_equals_one.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/n_equals_one.json
new file mode 100644
index 000000000000..d8065e57c87d
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/n_equals_one.json
@@ -0,0 +1,16 @@
+{
+ "norm": "M",
+ "N": 1,
+ "DL": [],
+ "strideDL": -1,
+ "offsetDL": -1,
+ "D": [
+ 42
+ ],
+ "strideD": -1,
+ "offsetD": 0,
+ "DU": [],
+ "strideDU": -1,
+ "offsetDU": -1,
+ "expected": 42
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/one_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/one_norm.json
new file mode 100644
index 000000000000..2a7dfb8256a4
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/negative_strides/one_norm.json
@@ -0,0 +1,30 @@
+{
+ "norm": "1",
+ "N": 5,
+ "DL": [
+ 4,
+ 1,
+ -2,
+ 3
+ ],
+ "strideDL": -1,
+ "offsetDL": 3,
+ "D": [
+ 7,
+ 2,
+ -3,
+ 5,
+ -1
+ ],
+ "strideD": -1,
+ "offsetD": 4,
+ "DU": [
+ -3,
+ 4,
+ -1,
+ 2
+ ],
+ "strideDU": -1,
+ "offsetDU": 3,
+ "expected": 10
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/frobenius_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/frobenius_norm.json
new file mode 100644
index 000000000000..cc142b6e09d0
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/frobenius_norm.json
@@ -0,0 +1,33 @@
+{
+ "norm": "F",
+ "N": 5,
+ "DL": [
+ 9999,
+ 3,
+ -2,
+ 1,
+ 4
+ ],
+ "strideDL": 1,
+ "offsetDL": 1,
+ "D": [
+ 9999,
+ -1,
+ 5,
+ -3,
+ 2,
+ 7
+ ],
+ "strideD": 1,
+ "offsetD": 1,
+ "DU": [
+ 9999,
+ 2,
+ -1,
+ 4,
+ -3
+ ],
+ "strideDU": 1,
+ "offsetDU": 1,
+ "expected": 12.165525060596439
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/inf_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/inf_norm.json
new file mode 100644
index 000000000000..eefe719c19b0
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/inf_norm.json
@@ -0,0 +1,33 @@
+{
+ "norm": "I",
+ "N": 5,
+ "DL": [
+ 9999,
+ 3,
+ -2,
+ 1,
+ 4
+ ],
+ "strideDL": 1,
+ "offsetDL": 1,
+ "D": [
+ 9999,
+ -1,
+ 5,
+ -3,
+ 2,
+ 7
+ ],
+ "strideD": 1,
+ "offsetD": 1,
+ "DU": [
+ 9999,
+ 2,
+ -1,
+ 4,
+ -3
+ ],
+ "strideDU": 1,
+ "offsetDU": 1,
+ "expected": 11
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/large_frobenius_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/large_frobenius_norm.json
new file mode 100644
index 000000000000..009343660818
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/large_frobenius_norm.json
@@ -0,0 +1,48 @@
+{
+ "norm": "F",
+ "N": 10,
+ "DL": [
+ 9999,
+ 1,
+ -2,
+ 3,
+ -4,
+ 5,
+ -6,
+ 7,
+ -8,
+ 9
+ ],
+ "strideDL": 1,
+ "offsetDL": 1,
+ "D": [
+ 9999,
+ 10,
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideD": 1,
+ "offsetD": 1,
+ "DU": [
+ 9999,
+ -1,
+ 2,
+ -3,
+ 4,
+ -5,
+ 6,
+ -7,
+ 8,
+ -9
+ ],
+ "strideDU": 1,
+ "offsetDU": 1,
+ "expected": 30.903074280724887
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/large_inf_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/large_inf_norm.json
new file mode 100644
index 000000000000..6758ce0c955c
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/large_inf_norm.json
@@ -0,0 +1,48 @@
+{
+ "norm": "I",
+ "N": 10,
+ "DL": [
+ 9999,
+ 1,
+ -2,
+ 3,
+ -4,
+ 5,
+ -6,
+ 7,
+ -8,
+ 9
+ ],
+ "strideDL": 1,
+ "offsetDL": 1,
+ "D": [
+ 9999,
+ 10,
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideD": 1,
+ "offsetD": 1,
+ "DU": [
+ 9999,
+ -1,
+ 2,
+ -3,
+ 4,
+ -5,
+ 6,
+ -7,
+ 8,
+ -9
+ ],
+ "strideDU": 1,
+ "offsetDU": 1,
+ "expected": 19
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/large_n.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/large_n.json
new file mode 100644
index 000000000000..9601bdc81552
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/large_n.json
@@ -0,0 +1,48 @@
+{
+ "norm": "M",
+ "N": 10,
+ "DL": [
+ 9999,
+ 1,
+ -2,
+ 3,
+ -4,
+ 5,
+ -6,
+ 7,
+ -8,
+ 9
+ ],
+ "strideDL": 1,
+ "offsetDL": 1,
+ "D": [
+ 9999,
+ 10,
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideD": 1,
+ "offsetD": 1,
+ "DU": [
+ 9999,
+ -1,
+ 2,
+ -3,
+ 4,
+ -5,
+ 6,
+ -7,
+ 8,
+ -9
+ ],
+ "strideDU": 1,
+ "offsetDU": 1,
+ "expected": 10
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/large_one_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/large_one_norm.json
new file mode 100644
index 000000000000..7396bfcc4ee8
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/large_one_norm.json
@@ -0,0 +1,48 @@
+{
+ "norm": "1",
+ "N": 10,
+ "DL": [
+ 9999,
+ 1,
+ -2,
+ 3,
+ -4,
+ 5,
+ -6,
+ 7,
+ -8,
+ 9
+ ],
+ "strideDL": 1,
+ "offsetDL": 1,
+ "D": [
+ 9999,
+ 10,
+ -9,
+ 8,
+ -7,
+ 6,
+ -5,
+ 4,
+ -3,
+ 2,
+ -1
+ ],
+ "strideD": 1,
+ "offsetD": 1,
+ "DU": [
+ 9999,
+ -1,
+ 2,
+ -3,
+ 4,
+ -5,
+ 6,
+ -7,
+ 8,
+ -9
+ ],
+ "strideDU": 1,
+ "offsetDU": 1,
+ "expected": 19
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/max_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/max_norm.json
new file mode 100644
index 000000000000..4e6531e5e403
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/max_norm.json
@@ -0,0 +1,33 @@
+{
+ "norm": "M",
+ "N": 5,
+ "DL": [
+ 9999,
+ 3,
+ -2,
+ 1,
+ 4
+ ],
+ "strideDL": 1,
+ "offsetDL": 1,
+ "D": [
+ 9999,
+ -1,
+ 5,
+ -3,
+ 2,
+ 7
+ ],
+ "strideD": 1,
+ "offsetD": 1,
+ "DU": [
+ 9999,
+ 2,
+ -1,
+ 4,
+ -3
+ ],
+ "strideDU": 1,
+ "offsetDU": 1,
+ "expected": 7
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/n_equals_one.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/n_equals_one.json
new file mode 100644
index 000000000000..4d91fdb46b0d
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/n_equals_one.json
@@ -0,0 +1,21 @@
+{
+ "norm": "M",
+ "N": 1,
+ "DL": [
+ 9999
+ ],
+ "strideDL": 1,
+ "offsetDL": 1,
+ "D": [
+ 9999,
+ 42
+ ],
+ "strideD": 1,
+ "offsetD": 1,
+ "DU": [
+ 9999
+ ],
+ "strideDU": 1,
+ "offsetDU": 1,
+ "expected": 42
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/one_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/one_norm.json
new file mode 100644
index 000000000000..faec20d01e6c
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/offsets/one_norm.json
@@ -0,0 +1,33 @@
+{
+ "norm": "1",
+ "N": 5,
+ "DL": [
+ 9999,
+ 3,
+ -2,
+ 1,
+ 4
+ ],
+ "strideDL": 1,
+ "offsetDL": 1,
+ "D": [
+ 9999,
+ -1,
+ 5,
+ -3,
+ 2,
+ 7
+ ],
+ "strideD": 1,
+ "offsetD": 1,
+ "DU": [
+ 9999,
+ 2,
+ -1,
+ 4,
+ -3
+ ],
+ "strideDU": 1,
+ "offsetDU": 1,
+ "expected": 10
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/one_norm.json b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/one_norm.json
new file mode 100644
index 000000000000..a69ebbcf7b06
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/fixtures/one_norm.json
@@ -0,0 +1,30 @@
+{
+ "norm": "1",
+ "N": 5,
+ "DL": [
+ 3,
+ -2,
+ 1,
+ 4
+ ],
+ "strideDL": 1,
+ "offsetDL": 0,
+ "D": [
+ -1,
+ 5,
+ -3,
+ 2,
+ 7
+ ],
+ "strideD": 1,
+ "offsetD": 0,
+ "DU": [
+ 2,
+ -1,
+ 4,
+ -3
+ ],
+ "strideDU": 1,
+ "offsetDU": 0,
+ "expected": 10
+}
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/test.dlangt.js b/lib/node_modules/@stdlib/lapack/base/dlangt/test/test.dlangt.js
new file mode 100644
index 000000000000..ff57fc96d6c5
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/test.dlangt.js
@@ -0,0 +1,312 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var Float64Array = require( '@stdlib/array/float64' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+var abs = require( '@stdlib/math/base/special/abs' );
+var dlangt = require( './../lib/dlangt.js' );
+
+
+// FIXTURES //
+
+var MAX_NORM = require( './fixtures/max_norm.json' );
+var ONE_NORM = require( './fixtures/one_norm.json' );
+var INF_NORM = require( './fixtures/inf_norm.json' );
+var FROBENIUS_NORM = require( './fixtures/frobenius_norm.json' );
+var LARGE_N = require( './fixtures/large_n.json' );
+var N_EQUALS_ONE = require( './fixtures/n_equals_one.json' );
+var LARGE_ONE_NORM = require( './fixtures/large_one_norm.json' );
+var LARGE_INF_NORM = require( './fixtures/large_inf_norm.json' );
+var LARGE_FROBENIUS_NORM = require( './fixtures/large_frobenius_norm.json' );
+
+
+// FUNCTIONS //
+
+/**
+* Tests whether two values are approximately equal.
+*
+* @private
+* @param {number} actual - actual value
+* @param {number} expected - expected value
+* @param {number} tol - tolerance
+* @returns {boolean} boolean indicating whether values are approximately equal
+*/
+function isApprox( actual, expected, tol ) {
+ var delta;
+ if ( actual === expected ) {
+ return true;
+ }
+ delta = abs( actual - expected );
+ return ( delta <= tol );
+}
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof dlangt, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'the function has an arity of 8', function test( t ) {
+ t.strictEqual( dlangt.length, 8, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function throws an error if provided an invalid first argument', function test( t ) {
+ var values;
+ var DL;
+ var DU;
+ var D;
+ var i;
+
+ values = [
+ 'X',
+ 'Z',
+ '2',
+ 'max',
+ 'frobenius'
+ ];
+
+ DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+ D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+ DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ dlangt( value, 4, DL, 1, D, 1, DU, 1 );
+ };
+ }
+});
+
+tape( 'the function returns 0 when N is 0', function test( t ) {
+ var DL = new Float64Array( 0 );
+ var DU = new Float64Array( 0 );
+ var D = new Float64Array( 0 );
+ var v;
+
+ v = dlangt( 'M', 0, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, 0.0, 'returns expected value' );
+
+ v = dlangt( '1', 0, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, 0.0, 'returns expected value' );
+
+ v = dlangt( 'I', 0, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, 0.0, 'returns expected value' );
+
+ v = dlangt( 'F', 0, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, 0.0, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function computes the max norm (N=5)', function test( t ) {
+ var data = MAX_NORM;
+ var DL = new Float64Array( data.DL );
+ var DU = new Float64Array( data.DU );
+ var D = new Float64Array( data.D );
+ var v;
+
+ v = dlangt( data.norm, data.N, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function computes the one norm (N=5)', function test( t ) {
+ var data = ONE_NORM;
+ var DL = new Float64Array( data.DL );
+ var DU = new Float64Array( data.DU );
+ var D = new Float64Array( data.D );
+ var v;
+
+ v = dlangt( data.norm, data.N, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function computes the infinity norm (N=5)', function test( t ) {
+ var data = INF_NORM;
+ var DL = new Float64Array( data.DL );
+ var DU = new Float64Array( data.DU );
+ var D = new Float64Array( data.D );
+ var v;
+
+ v = dlangt( data.norm, data.N, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function computes the Frobenius norm (N=5)', function test( t ) {
+ var data = FROBENIUS_NORM;
+ var DL = new Float64Array( data.DL );
+ var DU = new Float64Array( data.DU );
+ var D = new Float64Array( data.D );
+ var v;
+
+ v = dlangt( data.norm, data.N, DL, 1, D, 1, DU, 1 );
+ t.ok( isApprox( v, data.expected, 2.0 * EPS * abs( data.expected ) ), 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function computes the max norm (N=10)', function test( t ) {
+ var data = LARGE_N;
+ var DL = new Float64Array( data.DL );
+ var DU = new Float64Array( data.DU );
+ var D = new Float64Array( data.D );
+ var v;
+
+ v = dlangt( data.norm, data.N, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function computes the one norm (N=10)', function test( t ) {
+ var data = LARGE_ONE_NORM;
+ var DL = new Float64Array( data.DL );
+ var DU = new Float64Array( data.DU );
+ var D = new Float64Array( data.D );
+ var v;
+
+ v = dlangt( data.norm, data.N, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function computes the infinity norm (N=10)', function test( t ) {
+ var data = LARGE_INF_NORM;
+ var DL = new Float64Array( data.DL );
+ var DU = new Float64Array( data.DU );
+ var D = new Float64Array( data.D );
+ var v;
+
+ v = dlangt( data.norm, data.N, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function computes the Frobenius norm (N=10)', function test( t ) {
+ var data = LARGE_FROBENIUS_NORM;
+ var DL = new Float64Array( data.DL );
+ var DU = new Float64Array( data.DU );
+ var D = new Float64Array( data.D );
+ var v;
+
+ v = dlangt( data.norm, data.N, DL, 1, D, 1, DU, 1 );
+ t.ok( isApprox( v, data.expected, 2.0 * EPS * abs( data.expected ) ), 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function handles N=1 edge case', function test( t ) {
+ var data = N_EQUALS_ONE;
+ var DL = new Float64Array( 0 );
+ var DU = new Float64Array( 0 );
+ var D = new Float64Array( data.D );
+ var v;
+
+ v = dlangt( 'M', data.N, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, data.expected, 'returns expected value for max norm' );
+
+ v = dlangt( '1', data.N, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, data.expected, 'returns expected value for one norm' );
+
+ v = dlangt( 'I', data.N, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, data.expected, 'returns expected value for infinity norm' );
+
+ v = dlangt( 'F', data.N, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, data.expected, 'returns expected value for Frobenius norm' );
+
+ t.end();
+});
+
+tape( 'the function computes the infinity norm when a middle row has the largest sum', function test( t ) {
+ var DL = new Float64Array( [ 5.0, 1.0 ] );
+ var DU = new Float64Array( [ 1.0, 5.0 ] );
+ var D = new Float64Array( [ 1.0, 10.0, 1.0 ] );
+ var v;
+
+ v = dlangt( 'I', 3, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, 20.0, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function computes the max norm when the largest element is in the sub-diagonal', function test( t ) {
+ // DL has the max element (20), larger than any D or DU element
+ var DL = new Float64Array( [ 1.0, 20.0, 1.0 ] );
+ var DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+ var D = new Float64Array( [ 2.0, 3.0, 4.0, 5.0 ] );
+ var v;
+
+ v = dlangt( 'M', 4, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, 20.0, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function computes the max norm when the largest element is in the super-diagonal', function test( t ) {
+ // DU has the max element (30), larger than any D or DL element
+ var DL = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+ var DU = new Float64Array( [ 1.0, 30.0, 1.0 ] );
+ var D = new Float64Array( [ 2.0, 3.0, 4.0, 5.0 ] );
+ var v;
+
+ v = dlangt( 'M', 4, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, 30.0, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function supports lowercase and alternate Frobenius norm characters', function test( t ) {
+ var expected;
+ var DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+ var DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+ var D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+ var v;
+
+ expected = dlangt( 'F', 4, DL, 1, D, 1, DU, 1 );
+
+ v = dlangt( 'f', 4, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, expected, 'returns expected value for lowercase f' );
+
+ v = dlangt( 'E', 4, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, expected, 'returns expected value for E' );
+
+ v = dlangt( 'e', 4, DL, 1, D, 1, DU, 1 );
+ t.strictEqual( v, expected, 'returns expected value for lowercase e' );
+
+ t.end();
+});
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/test.js b/lib/node_modules/@stdlib/lapack/base/dlangt/test/test.js
new file mode 100644
index 000000000000..a848381128c2
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/test.js
@@ -0,0 +1,82 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var proxyquire = require( 'proxyquire' );
+var IS_BROWSER = require( '@stdlib/assert/is-browser' );
+var dlangt = require( './../lib' );
+
+
+// VARIABLES //
+
+var opts = {
+ 'skip': IS_BROWSER
+};
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof dlangt, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'attached to the main export is a method providing an ndarray interface', function test( t ) {
+ t.strictEqual( typeof dlangt.ndarray, 'function', 'method is a function' );
+ t.end();
+});
+
+tape( 'if a native implementation is available, the main export is the native implementation', opts, function test( t ) {
+ var dlangt = proxyquire( './../lib', {
+ '@stdlib/utils/try-require': tryRequire
+ });
+
+ t.strictEqual( dlangt, mock, 'returns expected value' );
+ t.end();
+
+ function tryRequire() {
+ return mock;
+ }
+
+ function mock() {
+ // Mock...
+ }
+});
+
+tape( 'if a native implementation is not available, the main export is a JavaScript implementation', opts, function test( t ) {
+ var dlangt;
+ var main;
+
+ main = require( './../lib/main.js' );
+
+ dlangt = proxyquire( './../lib', {
+ '@stdlib/utils/try-require': tryRequire
+ });
+
+ t.strictEqual( dlangt, main, 'returns expected value' );
+ t.end();
+
+ function tryRequire() {
+ return new Error( 'Cannot find module' );
+ }
+});
diff --git a/lib/node_modules/@stdlib/lapack/base/dlangt/test/test.ndarray.js b/lib/node_modules/@stdlib/lapack/base/dlangt/test/test.ndarray.js
new file mode 100644
index 000000000000..599402890dd8
--- /dev/null
+++ b/lib/node_modules/@stdlib/lapack/base/dlangt/test/test.ndarray.js
@@ -0,0 +1,304 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+/* eslint-disable max-len */
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var Float64Array = require( '@stdlib/array/float64' );
+var EPS = require( '@stdlib/constants/float64/eps' );
+var abs = require( '@stdlib/math/base/special/abs' );
+var dlangt = require( './../lib/ndarray.js' );
+
+
+// FIXTURES //
+
+var MAX_NORM = require( './fixtures/max_norm.json' );
+var ONE_NORM = require( './fixtures/one_norm.json' );
+var INF_NORM = require( './fixtures/inf_norm.json' );
+var FROBENIUS_NORM = require( './fixtures/frobenius_norm.json' );
+var LARGE_N = require( './fixtures/large_n.json' );
+var LARGE_ONE_NORM = require( './fixtures/large_one_norm.json' );
+var LARGE_INF_NORM = require( './fixtures/large_inf_norm.json' );
+var LARGE_FROBENIUS_NORM = require( './fixtures/large_frobenius_norm.json' );
+var N_EQUALS_ONE = require( './fixtures/n_equals_one.json' );
+var OFFSET_MAX_NORM = require( './fixtures/offsets/max_norm.json' );
+var OFFSET_ONE_NORM = require( './fixtures/offsets/one_norm.json' );
+var OFFSET_INF_NORM = require( './fixtures/offsets/inf_norm.json' );
+var OFFSET_FROBENIUS_NORM = require( './fixtures/offsets/frobenius_norm.json' );
+var NEG_MAX_NORM = require( './fixtures/negative_strides/max_norm.json' );
+var NEG_ONE_NORM = require( './fixtures/negative_strides/one_norm.json' );
+var NEG_INF_NORM = require( './fixtures/negative_strides/inf_norm.json' );
+var NEG_FROBENIUS_NORM = require( './fixtures/negative_strides/frobenius_norm.json' );
+var LARGE_STRIDE_MAX_NORM = require( './fixtures/large_strides/max_norm.json' );
+var LARGE_STRIDE_ONE_NORM = require( './fixtures/large_strides/one_norm.json' );
+var LARGE_STRIDE_INF_NORM = require( './fixtures/large_strides/inf_norm.json' );
+var LARGE_STRIDE_FROBENIUS_NORM = require( './fixtures/large_strides/frobenius_norm.json' );
+var MIXED_STRIDES_MAX_NORM = require( './fixtures/mixed_strides/max_norm.json' );
+var MIXED_STRIDES_ONE_NORM = require( './fixtures/mixed_strides/one_norm.json' );
+var MIXED_STRIDES_INF_NORM = require( './fixtures/mixed_strides/inf_norm.json' );
+var MIXED_STRIDES_FROBENIUS_NORM = require( './fixtures/mixed_strides/frobenius_norm.json' );
+
+
+// FUNCTIONS //
+
+function isApprox( actual, expected, tol ) {
+ var delta;
+ if ( actual === expected ) {
+ return true;
+ }
+ delta = abs( actual - expected );
+ return ( delta <= tol );
+}
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+ t.ok( true, __filename );
+ t.strictEqual( typeof dlangt, 'function', 'main export is a function' );
+ t.end();
+});
+
+tape( 'the function has an arity of 11', function test( t ) {
+ t.strictEqual( dlangt.length, 11, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function throws an error if provided an invalid first argument', function test( t ) {
+ var values;
+ var DL;
+ var DU;
+ var D;
+ var i;
+
+ values = [ 'X', 'Z', '2', 'max' ];
+
+ DL = new Float64Array( [ 1.0, 2.0, 3.0 ] );
+ D = new Float64Array( [ 4.0, 5.0, 6.0, 7.0 ] );
+ DU = new Float64Array( [ 1.0, 1.0, 1.0 ] );
+
+ for ( i = 0; i < values.length; i++ ) {
+ t.throws( badValue( values[ i ] ), TypeError, 'throws an error when provided ' + values[ i ] );
+ }
+ t.end();
+
+ function badValue( value ) {
+ return function badValue() {
+ dlangt( value, 4, DL, 1, 0, D, 1, 0, DU, 1, 0 );
+ };
+ }
+});
+
+tape( 'the function returns 0 when N is 0', function test( t ) {
+ var DL = new Float64Array( 0 );
+ var DU = new Float64Array( 0 );
+ var D = new Float64Array( 0 );
+
+ t.strictEqual( dlangt( 'M', 0, DL, 1, 0, D, 1, 0, DU, 1, 0 ), 0.0, 'returns expected value' );
+ t.strictEqual( dlangt( '1', 0, DL, 1, 0, D, 1, 0, DU, 1, 0 ), 0.0, 'returns expected value' );
+ t.strictEqual( dlangt( 'I', 0, DL, 1, 0, D, 1, 0, DU, 1, 0 ), 0.0, 'returns expected value' );
+ t.strictEqual( dlangt( 'F', 0, DL, 1, 0, D, 1, 0, DU, 1, 0 ), 0.0, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function computes the max norm (N=5)', function test( t ) {
+ var data = MAX_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function computes the one norm (N=5)', function test( t ) {
+ var data = ONE_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function computes the infinity norm (N=5)', function test( t ) {
+ var data = INF_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function computes the Frobenius norm (N=5)', function test( t ) {
+ var data = FROBENIUS_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.ok( isApprox( v, data.expected, 2.0 * EPS * abs( data.expected ) ), 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function computes the max norm (N=10)', function test( t ) {
+ var data = LARGE_N;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function computes the one norm (N=10)', function test( t ) {
+ var data = LARGE_ONE_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function computes the infinity norm (N=10)', function test( t ) {
+ var data = LARGE_INF_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function computes the Frobenius norm (N=10)', function test( t ) {
+ var data = LARGE_FROBENIUS_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.ok( isApprox( v, data.expected, 2.0 * EPS * abs( data.expected ) ), 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function handles N=1 edge case', function test( t ) {
+ var data = N_EQUALS_ONE;
+ var DL = new Float64Array( 0 );
+ var DU = new Float64Array( 0 );
+ var D = new Float64Array( data.D );
+
+ t.strictEqual( dlangt( 'M', 1, DL, 1, 0, D, 1, 0, DU, 1, 0 ), 42.0, 'returns expected value' );
+ t.strictEqual( dlangt( '1', 1, DL, 1, 0, D, 1, 0, DU, 1, 0 ), 42.0, 'returns expected value' );
+ t.strictEqual( dlangt( 'I', 1, DL, 1, 0, D, 1, 0, DU, 1, 0 ), 42.0, 'returns expected value' );
+ t.strictEqual( dlangt( 'F', 1, DL, 1, 0, D, 1, 0, DU, 1, 0 ), 42.0, 'returns expected value' );
+
+ t.end();
+});
+
+tape( 'the function supports providing index offsets (max norm)', function test( t ) {
+ var data = OFFSET_MAX_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports providing index offsets (one norm)', function test( t ) {
+ var data = OFFSET_ONE_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports providing index offsets (infinity norm)', function test( t ) {
+ var data = OFFSET_INF_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports providing index offsets (Frobenius norm)', function test( t ) {
+ var data = OFFSET_FROBENIUS_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.ok( isApprox( v, data.expected, 2.0 * EPS * abs( data.expected ) ), 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports negative strides (max norm)', function test( t ) {
+ var data = NEG_MAX_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports negative strides (one norm)', function test( t ) {
+ var data = NEG_ONE_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports negative strides (infinity norm)', function test( t ) {
+ var data = NEG_INF_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports negative strides (Frobenius norm)', function test( t ) {
+ var data = NEG_FROBENIUS_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.ok( isApprox( v, data.expected, 2.0 * EPS * abs( data.expected ) ), 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports large strides (max norm)', function test( t ) {
+ var data = LARGE_STRIDE_MAX_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports large strides (one norm)', function test( t ) {
+ var data = LARGE_STRIDE_ONE_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports large strides (infinity norm)', function test( t ) {
+ var data = LARGE_STRIDE_INF_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports large strides (Frobenius norm)', function test( t ) {
+ var data = LARGE_STRIDE_FROBENIUS_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.ok( isApprox( v, data.expected, 2.0 * EPS * abs( data.expected ) ), 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports mixed strides (max norm)', function test( t ) {
+ var data = MIXED_STRIDES_MAX_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports mixed strides (one norm)', function test( t ) {
+ var data = MIXED_STRIDES_ONE_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports mixed strides (infinity norm)', function test( t ) {
+ var data = MIXED_STRIDES_INF_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.strictEqual( v, data.expected, 'returns expected value' );
+ t.end();
+});
+
+tape( 'the function supports mixed strides (Frobenius norm)', function test( t ) {
+ var data = MIXED_STRIDES_FROBENIUS_NORM;
+ var v = dlangt( data.norm, data.N, new Float64Array( data.DL ), data.strideDL, data.offsetDL, new Float64Array( data.D ), data.strideD, data.offsetD, new Float64Array( data.DU ), data.strideDU, data.offsetDU );
+ t.ok( isApprox( v, data.expected, 2.0 * EPS * abs( data.expected ) ), 'returns expected value' );
+ t.end();
+});