## DiffEqFlux v1.12.1 [Diff since v1.12.0](https://github.com/SciML/DiffEqFlux.jl/compare/v1.12.0...v1.12.1) **Closed issues:** - Implicit differential equation solver with internal autodiff of the Jacobian (#31) - BSplines to approximate gradient of data (#75) - Neural optimal control documentation (#174) - README Stable docs links broken (#251) - Indexing solution in loss function gives zero gradient with default sensealg (#259) - RadauAII5 and typeassert issues in autodiff (#271) - Error in LV-Univ example (#275) **Merged pull requests:** - add analytical tgrad for mass matrix methods (#224) (@ChrisRackauckas) - Add mini batch docs (#267) (@collinwarner) - add nested AD stiff tests and update docs (#274) (@ChrisRackauckas) - Update docs (#277) (@mkg33) - Update LICENSE (#280) (@ViralBShah) - Add Documentation for LV-NN-Stiff.md (#285) (@JeremyFongSP) - Fix for RecursiveArrayTools broadcast fix (#286) (@ChrisRackauckas)