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‎.github/workflows/maven.yml‎

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SONARQUBE_TOKEN: ${{ secrets.SONARQUBE_TOKEN }}
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SONARQUBE_HOST_URL: ${{ vars.SONARQUBE_HOST_URL }}
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- name: Deployment
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if: ( github.repository == 'Hipparchus-Math/hipparchus' ) && ( ( github.ref == 'refs/heads/master' ) || startsWith( github.ref, 'refs/heads/release-' ) )
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if: ( github.repository == 'Hipparchus-Math/hipparchus' ) && ( ( github.ref == 'refs/heads/main' ) || startsWith( github.ref, 'refs/heads/release-' ) )
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run: mvn -B -U -f pom.xml -s .CI/maven-settings.xml deploy -Pci-deploy -DskipTests=true
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env:
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NEXUS_USERNAME: ${{ secrets.NEXUS_USERNAME }}

‎CONTRIBUTING.md‎

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Making Changes
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--------------
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+ Create a topic branch from where you want to base your work (this is usually the master/trunk branch).
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+ Create a topic branch from where you want to base your work (this is usually the main branch).
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+ Make commits of logical units.
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+ Respect the original code style:
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+ Only use spaces for indentation.

‎README.md‎

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<project>
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<properties>
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<!-- change the Hipparchus version number to the one suiting your needs -->
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<myprojectname.hipparchus.version>3.1</myprojectname.hipparchus.version>
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<myprojectname.hipparchus.version>4.0</myprojectname.hipparchus.version>
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</properties>
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<dependencies>
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</project>
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```
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If your project previously depended on [Apache Commons Math](https://commons.apache.org/proper/commons-math/)
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and you want to switch to Hipparchus, you can also add the temporary migration jar
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```xml
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<dependency>
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<groupId>org.hipparchus</groupId>
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<artifactId>hipparchus-migration</artifactId>
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<version>${myprojectname.hipparchus.version}</version>
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</dependency>
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```
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Contributing
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------------
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There are some guidelines which
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will make applying contributions easier for us. Please read through our
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[contributing guidelines](https://github.com/Hipparchus-Math/hipparchus/blob/master/CONTRIBUTING.md).
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[contributing guidelines](https://github.com/Hipparchus-Math/hipparchus/blob/main/CONTRIBUTING.md).
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To contact us, use the shared [forum](https://forum.orekit.org/categories) where several categories
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are dedicated to Hipparchus.

‎RELEASE-NOTES.txt‎

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Hipparchus 3.1 RELEASE NOTES
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Hipparchus 4.0 RELEASE NOTES
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The Hipparchus team is pleased to announce the release of hipparchus-3.1
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The Hipparchus team is pleased to announce the release of hipparchus-4.0
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The Hipparchus library is a library of mathematical components. It started as a fork of Apache Commons Math.
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This is a maintenance release. It includes several bugfixes and
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improvements, and adds one important feature: constrained
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optimization! Other additions are Gauss-Markov order 1 autoregressive
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process generation and GCD/LCM to {Big}Fraction.
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This is a major release. It adds features to Kalman filtering,
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adds a reset mechanism in events and propagation direction in (Field)AdaptableInterval,
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and improves numerical stability in BSP-tree operations.
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Changes in this version include:
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New features:
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o issues/269: Add public, static access to integrators name.
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o issues/300: Add possibility to use real coefficients for Butcher array based Field integrators.
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o issues/296: Added constrained optimization. Thanks to Francesco Rocca.
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o issues/294: Added GCD and LCM to {Big}Fraction. Thanks to Axel Kramer.
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o issues/281: Add default implementations in CalculusFieldElement and inheritors.
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o issues/280: Add square method to CalculusFieldElement.
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o issues/363: Add a (backwards) smoother counterpart to the linear Kalman, extended Kalman and unscented filters.
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o issues/328: Add inverse transform method to UnscentedTransformProvider.
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o issues/382: Added reset mechanism in ODE event detection.
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o issues/260: Added FieldPolynomialFunctionLagrangeForm.
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o issues/370: Added native way to stack an independent variable in (Field)Gradient.
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o issues/335: Add boolean for propagation direction in (Field)AdaptableInterval.
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Fixed Bugs:
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o issues/290: Fixes regressions with Field in event detection.
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o issues/291: Fix broken newInstance method for FieldTuple.
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o issues/367: Added getHipparchusVersion method to MathUtils.
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o issues/384: Fixed issue with open boundaries in Euclidean 2D-polygons.
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o issues/360: Increased dimension of directions numbers in Sobol sequence generation.
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o issues/354: Added FieldBivariateGridInterpolator, FieldBilinearInterpolator and FieldBilinearInterpolatingFunction.
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o issues/347: Fixed JUnit pioneer dependency version not compatible with Java 8.
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o issues/339: Changed CDN for faster site load.
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Changes:
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o issues/277: Improved release guide. Thanks to Bryan.
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o issues/333: Added Gauss-Markov order 1 autoregressive process generation.
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o issues/289: Added equals and hashCode to OpenIntTo{Double|Field}HashMap.
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o issues/327: Allow variable arguments for building PolynomialFunction.
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o issues/322: Extracted class JacobiKey from PolynomialsUtils.
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o issues/304: Allow retrieving correct Cardan/Euler angles even at singularity.
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o issues/302: Improved performance of Gradient.
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o issues/288: Replace uses of scalar multiplication on Field one.
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o issues/286: Rework interfaces for Derivative and FieldDerivative.
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o Added moveTowards method to Point interface.
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o issues/372: Rename RungeKutta(Field)Integrator as FixedStepRungeKutta(Field)Integrator.
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o issues/314: Improved robustness of BSP tree operations.
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o issues/361: Rename DEFAULT_MAXCHECK as DEFAULT_MAX_CHECK.
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o issues/330: Made constructors of abstract classes protected when they were public.
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o issues/350: Removed obsolete hipparchus-migration module.
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o issues/349: Added getAddendum() to CalculusFieldElement interface.
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o issues/346: Added getLocalizedString(baseName, key, locale) with default implementation to Localizable interface.
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o issues/285: Migrated tests from JUnit 4 to JUnit 5.
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For complete information on Hipparchus, including instructions on how to submit bug reports,
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patches, or suggestions for improvement, see the Hipparchus website:

‎hipparchus-clustering/pom.xml‎

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<parent>
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<groupId>org.hipparchus</groupId>
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<artifactId>hipparchus</artifactId>
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<version>4.0-SNAPSHOT</version>
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<version>4.0</version>
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<relativePath>../hipparchus-parent</relativePath>
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</parent>
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‎hipparchus-clustering/src/changes/changes.xml‎

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<title>Hipparchus Clustering Release Notes</title>
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</properties>
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<body>
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<release version="4.0" date="TBD" description="TBD">
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<release version="4.0" date="2025-03-20" description="This is a major release.">
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<action dev="vincent" type="update" issue="issues/285">
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Migrated tests from JUnit 4 to JUnit 5
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</action>

‎hipparchus-clustering/src/site/site.xml‎

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<item name="2.3 API docs" href="https://hipparchus.org/apidocs-2.3/index.html"/>
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<item name="3.0 API docs" href="https://hipparchus.org/apidocs-3.0/index.html"/>
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<item name="3.1 API docs" href="https://hipparchus.org/apidocs-3.1/index.html"/>
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<item name="4.0 API docs" href="https://hipparchus.org/apidocs-4.0/index.html"/>
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<item name="Source Repository (current)" href="https://github.com/Hipparchus-Math/hipparchus"/>
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<item name="Global Coverage" href="../hipparchus-coverage/jacoco-aggregate/index.html"/>
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<item name="Developers Guide" href="../developers.html"/>

‎hipparchus-core/pom.xml‎

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<parent>
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<groupId>org.hipparchus</groupId>
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<artifactId>hipparchus</artifactId>
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<version>4.0-SNAPSHOT</version>
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<version>4.0</version>
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<relativePath>../hipparchus-parent</relativePath>
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</parent>
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‎hipparchus-core/src/changes/changes.xml‎

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<title>Hipparchus Core Release Notes</title>
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</properties>
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<body>
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<release version="4.0" date="TBD" description="TBD">
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<release version="4.0" date="2025-03-20"
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description="This is a major release. It include several improvements, mostly linked to Fields.">
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<action dev="luc" type="fix" issue="issues/367">
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Added getHipparchusVersion method to MathUtils.
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</action>
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Added getAddendum() to CalculusFieldElement interface.
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</action>
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<action dev="luc" type="update" issue="issues/346">
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Added getLocalizedString(baseName, key, locale) with default implementation
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to Localizable interface
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Added getLocalizedString(baseName, key, locale) with default implementation to Localizable interface.
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</action>
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<action dev="vincent" type="update" issue="issues/285">
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Migrated tests from JUnit 4 to JUnit 5

‎hipparchus-core/src/site/site.xml‎

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<item name="2.3 API docs" href="https://hipparchus.org/apidocs-2.3/index.html"/>
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<item name="3.0 API docs" href="https://hipparchus.org/apidocs-3.0/index.html"/>
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<item name="3.1 API docs" href="https://hipparchus.org/apidocs-3.1/index.html"/>
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<item name="4.0 API docs" href="https://hipparchus.org/apidocs-4.0/index.html"/>
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<item name="Source Repository (current)" href="https://github.com/Hipparchus-Math/hipparchus"/>
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<item name="Global Coverage" href="../hipparchus-coverage/jacoco-aggregate/index.html"/>
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<item name="Developers Guide" href="../developers.html"/>

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