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TensorFlow 2.15, drop Python 3.8 support
Major Features and Improvements
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- add correct uncertainty for unbinned, weighted fits with constraints and/or that are extended.
- allow mapping in ``zfit.param.set_values`` for values
Bug fixes and small changes
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- fix issues where EDM goes negative, set to 999
- improved stability of the loss evaluation
- improved uncertainty calculation accuracy with ``zfit_error``
Thanks
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Daniel Craik for the idea of allowing a mapping in ``set_values``