# Optim: gradient and Hessian of constraints

**URL:** <https://discourse.julialang.org/t/optim-gradient-and-hessian-of-constraints/31493>\
**Category:** Specific Domains\
**Tags:** optimization\
**Created:** [November 25, 2019, 1:57pm UTC](https://discourse.julialang.org/t/optim-gradient-and-hessian-of-constraints/31493 "2019-11-25T13:57:14Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![pkofod](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/pkofod/32/2179_2.png) [@pkofod](https://discourse.julialang.org/u/pkofod)\
**Post date:** [November 25, 2019, 4:15pm UTC](https://discourse.julialang.org/t/optim-gradient-and-hessian-of-constraints/31493/2 "2019-11-25T16:15:33Z")

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> [@Alois](#):
>
> TwiceDifferentiableConstraints

No one has implemented AD for those. It should be relatively simple though.

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