Add VNN Operations.

Author: ameritusweb

README.md

@@ -199,6 +199,30 @@ DeepScaleAndShiftOperation
 
 FlattenOperation
 
+### Vector Neural Network (VNN) Operations
+These types of operations typically operate on instances of the Matrix class where the left half are magnitudes and the right half are angles in radians.
+Learn more about Vector Neural Networks [here](https://www.amazon.com/Vector-Neural-Networks-Geometric-Tensors-ebook/dp/B0CXBV3DY5/ref=sr_1_1).
+
+ElementwiseSquareOperation
+
+ElementwiseVectorAddOperation
+
+ElementwiseVectorCartesianSummationOperation
+
+ElementwiseVectorConstituentMultiplyOperation
+
+ElementwiseVectorDecompositionOperation
+
+ElementwiseVectorMiniDecompositionOperation
+
+PairwiseSineSoftmaxOperation
+
+VectorAttentionBinaryOperation
+
+VectorAttentionOperation
+
+VectorizeOperation
+
 ### Neural Network Parameters
 
 Each neural network base class has a set of parameters that can be used to configure the neural network. They are as follows:

examples/gravnet/ParallelReverseAutoDiff.GravNetExample/VectorNetwork/RMAD/VectorAttentionOperation.cs

@@ -95,6 +95,5 @@ public override BackwardResult Backward(Matrix dOutput)
                 .AddInputGradient(dProbabilities)
                 .Build();
         }
-
     }
 }

src/ParallelReverseAutoDiff.1.1.65.nupkg renamed to src/ParallelReverseAutoDiff.1.2.0.nupkg

@@ -2,7 +2,7 @@
 <package xmlns="http://schemas.microsoft.com/packaging/2013/05/nuspec.xsd">
   <metadata>
     <id>ParallelReverseAutoDiff</id>
-    <version>1.1.65</version>
+    <version>1.2.0</version>
     <authors>ameritusweb</authors>
     <owners>ameritusweb</owners>
     <license type="expression">LGPL-2.1-only</license>
@@ -11,7 +11,7 @@
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <description>A library for parallelized reverse mode automatic differentiation in C# for custom neural network development.</description>
 	<repository type="git" url="https://github.com/ameritusweb/ParallelReverseAutoDiff.git" commit="0a9bbd18f45c4f4434160a7c064539f29f3a3c67" />
-    <releaseNotes>Fix GPU Matrix Multiply.</releaseNotes>
+    <releaseNotes>Add VNN Operations.</releaseNotes>
     <copyright>ameritusweb, 2024</copyright>
     <tags>autodiff automatic-differentiation parallel reverse-mode differentiation C# neural network</tags>
     <dependencies>

src/ParallelReverseAutoDiff.nuspec

@@ -0,0 +1,85 @@
+//------------------------------------------------------------------------------
+// <copyright file="ElementwiseSquareOperation.cs" author="ameritusweb" date="5/2/2023">
+// Copyright (c) 2023 ameritusweb All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+namespace ParallelReverseAutoDiff.RMAD
+{
+    using System;
+
+    /// <summary>
+    /// Performs the forward and backward operations for the element-wise square function.
+    /// </summary>
+    public class ElementwiseSquareOperation : Operation
+    {
+        private Matrix input;
+
+        /// <summary>
+        /// A common factory method for instantiating this operation.
+        /// </summary>
+        /// <param name="net">The neural network.</param>
+        /// <returns>The instantiated operation.</returns>
+        public static IOperation Instantiate(NeuralNetwork net)
+        {
+            return new ElementwiseSquareOperation();
+        }
+
+        /// <inheritdoc />
+        public override void Store(Guid id)
+        {
+            this.IntermediateMatrices.AddOrUpdate(id, this.input, (x, y) => this.input);
+        }
+
+        /// <inheritdoc />
+        public override void Restore(Guid id)
+        {
+            this.input = this.IntermediateMatrices[id];
+        }
+
+        /// <summary>
+        /// Performs the forward operation for the element-wise square function.
+        /// </summary>
+        /// <param name="input">The input to the element-wise square operation.</param>
+        /// <returns>The output of the element-wise square operation.</returns>
+        public Matrix Forward(Matrix input)
+        {
+            this.input = input;
+            int rows = input.Length;
+            int cols = input[0].Length;
+            this.Output = new Matrix(rows, cols);
+
+            for (int i = 0; i < rows; i++)
+            {
+                for (int j = 0; j < cols; j++)
+                {
+                    double x = input[i][j];
+                    this.Output[i][j] = x * x;
+                }
+            }
+
+            return this.Output;
+        }
+
+        /// <inheritdoc />
+        public override BackwardResult Backward(Matrix dLdOutput)
+        {
+            int rows = dLdOutput.Length;
+            int cols = dLdOutput[0].Length;
+            Matrix dLdInput = new Matrix(rows, cols);
+
+            for (int i = 0; i < rows; i++)
+            {
+                for (int j = 0; j < cols; j++)
+                {
+                    double x = this.input[i][j];
+                    double gradient = 2 * x;
+                    dLdInput[i][j] = dLdOutput[i][j] * gradient;
+                }
+            }
+
+            return new BackwardResultBuilder()
+                .AddInputGradient(dLdInput)
+                .Build();
+        }
+    }
+}

src/RMAD/ElementwiseSquareOperation.cs

@@ -0,0 +1,122 @@
+//------------------------------------------------------------------------------
+// <copyright file="ElementwiseVectorAddOperation.cs" author="ameritusweb" date="5/2/2023">
+// Copyright (c) 2023 ameritusweb All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+namespace ParallelReverseAutoDiff.RMAD
+{
+    using System;
+    using System.Threading.Tasks;
+
+    /// <summary>
+    /// Element-wise add operation.
+    /// </summary>
+    public class ElementwiseVectorAddOperation : Operation
+    {
+        private Matrix input1;
+        private Matrix input2;
+
+        /// <summary>
+        /// A common method for instantiating an operation.
+        /// </summary>
+        /// <param name="net">The neural network.</param>
+        /// <returns>The instantiated operation.</returns>
+        public static IOperation Instantiate(NeuralNetwork net)
+        {
+            return new ElementwiseVectorAddOperation();
+        }
+
+        /// <summary>
+        /// Performs the forward operation for the element-wise vector summation function.
+        /// </summary>
+        /// <param name="input1">The first input to the element-wise vector summation operation.</param>
+        /// <param name="input2">The second input to the element-wise vector summation operation.</param>
+        /// <returns>The output of the element-wise vector summation operation.</returns>
+        public Matrix Forward(Matrix input1, Matrix input2)
+        {
+            this.input1 = input1;
+            this.input2 = input2;
+
+            this.Output = new Matrix(this.input1.Rows, this.input1.Cols);
+            Parallel.For(0, input1.Rows, i =>
+            {
+                for (int j = 0; j < input1.Cols / 2; j++)
+                {
+                    // Accessing the magnitudes and angles from the concatenated matrices
+                    double magnitude = input1[i, j];
+                    double angle = input1[i, j + (input1.Cols / 2)];
+
+                    double wMagnitude = input2[i, j];
+                    double wAngle = input2[i, j + (input2.Cols / 2)];
+
+                    // Compute vector components
+                    double x1 = magnitude * Math.Cos(angle);
+                    double y1 = magnitude * Math.Sin(angle);
+                    double x2 = wMagnitude * Math.Cos(wAngle);
+                    double y2 = wMagnitude * Math.Sin(wAngle);
+
+                    double sumx = x1 + x2;
+                    double sumy = y1 + y2;
+
+                    // Compute resultant vector magnitude and angle
+                    double resultMagnitude = Math.Sqrt((sumx * sumx) + (sumy * sumy));
+                    double resultAngle = Math.Atan2(sumy, sumx);
+
+                    this.Output[i, j] = resultMagnitude;
+                    this.Output[i, j + (this.input1.Cols / 2)] = resultAngle;
+                }
+            });
+
+            return this.Output;
+        }
+
+        /// <inheritdoc />
+        public override BackwardResult Backward(Matrix dOutput)
+        {
+            Matrix dInput1 = new Matrix(this.input1.Rows, this.input1.Cols);
+            Matrix dInput2 = new Matrix(this.input2.Rows, this.input2.Cols);
+
+            Parallel.For(0, this.input1.Rows, i =>
+            {
+                for (int j = 0; j < this.input1.Cols / 2; j++)
+                {
+                    var magnitude = this.input1[i, j];
+                    var angle = this.input1[i, j + (this.input1.Cols / 2)];
+                    var wMagnitude = this.input2[i, j];
+                    var wAngle = this.input2[i, j + (this.input2.Cols / 2)];
+
+                    var x1 = magnitude * Math.Cos(angle);
+                    var y1 = magnitude * Math.Sin(angle);
+                    var x2 = wMagnitude * Math.Cos(wAngle);
+                    var y2 = wMagnitude * Math.Sin(wAngle);
+
+                    var combinedX = x1 + x2;
+                    var combinedY = y1 + y2;
+
+                    // Compute gradients for magnitude and angle
+                    double dResultMagnitude_dX = combinedX / this.Output[i, j];
+                    double dResultMagnitude_dY = combinedY / this.Output[i, j];
+
+                    double dResultAngle_dX = -combinedY / ((combinedX * combinedX) + (combinedY * combinedY));
+                    double dResultAngle_dY = combinedX / ((combinedX * combinedX) + (combinedY * combinedY));
+
+                    // Chain rule to compute gradients for input vectors
+                    dInput1[i, j] = (dOutput[i, j] * dResultMagnitude_dX * Math.Cos(angle)) +
+                                    (dOutput[i, j + (this.input1.Cols / 2)] * dResultAngle_dX * -Math.Sin(angle));
+                    dInput1[i, j + (this.input1.Cols / 2)] = (dOutput[i, j] * dResultMagnitude_dY * Math.Sin(angle)) +
+                                                             (dOutput[i, j + (this.input1.Cols / 2)] * dResultAngle_dY * Math.Cos(angle));
+
+                    dInput2[i, j] = (dOutput[i, j] * dResultMagnitude_dX * Math.Cos(wAngle)) +
+                                    (dOutput[i, j + (this.input2.Cols / 2)] * dResultAngle_dX * -Math.Sin(wAngle));
+                    dInput2[i, j + (this.input2.Cols / 2)] = (dOutput[i, j] * dResultMagnitude_dY * Math.Sin(wAngle)) +
+                                                             (dOutput[i, j + (this.input2.Cols / 2)] * dResultAngle_dY * Math.Cos(wAngle));
+                }
+            });
+
+            return new BackwardResultBuilder()
+                .AddInputGradient(dInput1)
+                .AddInputGradient(dInput2)
+                .Build();
+        }
+    }
+}