[Minuit2] Make function passing purely `std::function` based#20026

Merged

guitargeek merged 7 commits intoroot-project:masterfrom

guitargeek:minuit2_function

Oct 4, 2025

Commits on Oct 4, 2025

[Minuit2] Use native FCNBase type in NumericalDerivator class
guitargeek
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[Minuit2] Use smart pointers in Minuit2Minimizer
guitargeek
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[RF] Refactor multiprocess minimizer code to use Minuit 2 directly
guitargeek
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[Math] Don't leak Minuit 2 implementation details to IFunction classes
guitargeek
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[Minuit2] Merge FCNAdapter with -GradAdapter and use only std::function
guitargeek
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[Minuit2] Improve FCNBase and FCNAdapter documentation
guitargeek
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[RelNotes] Mention Minuit 2 interface changes related to FCN adapters
guitargeek
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