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Algebraic operations and intrinsic fuctions spend a non-negligigle time copying arrays
This should be avoided, especially since the class is used extensively in Orekit
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See Orekit forum post: https://forum.orekit.org/t/regression-with-field-propagation-detection/3108/4
These regressions are due to the use in FieldDetectorBasedEventState of isZero, when integration…
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Using sparklyr version 0.2.29, and sparkapi 0.3.18
On an AWS EM cluster, running the following to connect fails:
```
Sys.setenv(SPARK_HOME="/usr/lib/spark")
sc /etc/spark/conf
drwxr-xr-x 3 root roo…
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As part of a thread about [Powel optimizer](https://forum.orekit.org/t/how-to-define-constraints-for-the-powelloptimizer/2912/4), one participant proposed to contribute constrained optimization featur…
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The True Equator Mean Equinox is a reference frame used by NORAD TLEs and, therefore would be a nice addition to the `common` frames.
This can be implemented via a simple rotation about the CEP, st…
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**Describe the bug**
Git can't clone this repo on windows 11 because filename contains special characters `:` which not support on windows:
**Steps to reproduce**
1. git clone git clone https://g…
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Hi,
I was just using Hipparchus through Orekit in one of my projects and encountered this problem. The stack trace suggested that I file a bug report. The underlying issue seems to be with Hipparchu…
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# Feature
## Desired Behavior / Functionality
Currently only the Earth is available as a hard-coded central body. We'll need more flexibility :)
## What Needs to Be Done
- Implement other cent…
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I tried to build Hipparchus from scratch using `mvn install` and I had to manually add the surefire to the pom.xml plugin in order to build the library.
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For performance reasons (see for example [Orekit issue 1151](https://gitlab.orekit.org/orekit/orekit/-/issues/1151)) it could be nice to be able to check if a `Derivative` has zero values in all its d…