# \#diffractor

**URL:** https://discourse.julialang.org/tag/diffractor/1600.md

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## [Second-order autodiff: which combinations should work?](https://discourse.julialang.org/t/second-order-autodiff-which-combinations-should-work/114892)

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**Author:** [@gdalle](https://discourse.julialang.org/u/gdalle)\
**Replies:** 13\
**Last updated:** [May 30, 2024, 10:13am UTC](https://discourse.julialang.org/t/second-order-autodiff-which-combinations-should-work/114892 "2024-05-30T10:13:09Z")

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Hey there! My package DifferentiationInterface.jl provides the necessary infrastructure for second-order automatic differentiation (e.g. Hessians). It allows you to combine arbitrary pairs of AD backends, but of course …