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Hipparchus 1.5 RELEASE NOTES | ||
Hipparchus 1.6 RELEASE NOTES | ||
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The Hipparchus team is pleased to announce the release of hipparchus-1.5 | ||
The Hipparchus team is pleased to announce the release of hipparchus-1.6 | ||
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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. The main changes since last version are the introduction of field versions | ||
of bilinear interpolation, univariate interpolators, polynomials and polynomial spline functions, | ||
and the introduction of reset events in ODE. | ||
This is a maintenance release. The main changes are the addition of a field version of Vector2D, addition | ||
of an Optimum.of() factory method and a visibility change of the AbstractEvaluation constructor. | ||
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Changes in this version include: | ||
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New features: | ||
o issues/55: Added FieldBivariateFunction and make both BilinearInterpolatingFunction | ||
and PiecewiseBicubicSplineInterpolatingFunction implement it. | ||
Github: fixes #55. | ||
o Added FieldUnivariateInterpolator and make both LinearInterpolator, | ||
AkimaSplineInterpolator and SplineInterpolator implement it. | ||
o Added FieldPolynomialFunction and FieldPolynomialSplineFunction. | ||
o Add Action.RESET_EVENTS to ask the integrator to recheck all event detectors | ||
without recomputing the step. Use when the g function of one event detector | ||
depends on events occurring in another event detector. | ||
o issues/53: Fixed documentation for interpolation algorithms. | ||
Github: fixes #53. | ||
o Add Optimum.of(...). | ||
o Make AbstractEvaluation constructor public, fix javadoc. | ||
o Added field version of Vector2D. | ||
o issues/56: When exception message formatting fails still show a helpful message and stack trace. | ||
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Fixed Bugs: | ||
o Nullify corrected state after predict in abstract Kalman filter. Note that this affects | ||
only custom extensions of AbstractKalmanFilter because the implementations provided | ||
by Hipparchus (LinearKalmanFilter and ExtendedKalmanFilter) always call correction | ||
step after having called prediction step, so the nullified corrected state is reset | ||
properly at the end. This was initially reported as | ||
https://gitlab.orekit.org/orekit/orekit/issues/540. Thanks to Hao Peng. | ||
o issues/54: Avoid too many multi-step integrator restarts after event resetting derivatives. | ||
Github: fixes #54. | ||
o Fixed lines/polyhedrons intersection occurring on facets boundaries. | ||
o issues/62: Fixed missing safety check in multi-step integrators. | ||
o issues/61: Prevent stack overflow error when attempting integration with too large number of points. | ||
o issues/56: Show full precision in exception message when root bracketing fails. | ||
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For complete information on Hipparchus, including instructions on how to submit bug reports, | ||
patches, or suggestions for improvement, see the Hipparchus website: | ||
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https://www.hipparchus.org/ | ||
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