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enh: failure of hessian with singular matrix #70

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jonas-eschle opened this issue Apr 16, 2021 · 0 comments

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jonas-eschle commented Apr 16, 2021

Hesse can fail (minuit silent, numpy with SingularMatrixError) if a parameter has no derivative, e.g. a tail that wend outside of the datapoints.

We should catch this with an error message and maybe even (for numpy) point to the failing one

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