acts-project / acts-project/acts
Avoid direct inversion of covariance matrices for numerical stability
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Descrizione
As discussed in [PR #3877](https://github.com/acts-project/acts/pull/3877) ([comment](https://github.com/acts-project/acts/pull/3877#discussion_r1858614593)), it was suggested that we should generally avoid direct inversion of covariance matrices in the ACTS codebase and use solvers like `ldlt().solve()` for better numerical stability. This improvement can be applied throughout the project.
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