# Jump/Ipopt: is it possibe to retrieve the numerical Jacobian at the optimal point?

**URL:** <https://discourse.julialang.org/t/jump-ipopt-is-it-possibe-to-retrieve-the-numerical-jacobian-at-the-optimal-point/116896>\
**Category:** Optimization (Mathematical)\
**Tags:** question, jump\
**Created:** [July 11, 2024, 9:50am UTC](https://discourse.julialang.org/t/jump-ipopt-is-it-possibe-to-retrieve-the-numerical-jacobian-at-the-optimal-point/116896 "2024-07-11T09:50:52Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![sylvaticus](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/sylvaticus/32/203883_2.png) [@sylvaticus](https://discourse.julialang.org/u/sylvaticus)\
**Post date:** [July 11, 2024, 9:50am UTC](https://discourse.julialang.org/t/jump-ipopt-is-it-possibe-to-retrieve-the-numerical-jacobian-at-the-optimal-point/116896/1 "2024-07-11T09:50:52Z")

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Hello, on a nonlinear solved optimization problem (JuMP/Ipopt) is it possible to retrieve the values of the Jacobian matrix at the returned optimal point ?

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**Author:** ![pierre-haessig](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/pierre-haessig/32/217129_2.png) [@pierre-haessig](https://discourse.julialang.org/u/pierre-haessig)\
**Post date:** [July 12, 2024, 8:18am UTC](https://discourse.julialang.org/t/jump-ipopt-is-it-possibe-to-retrieve-the-numerical-jacobian-at-the-optimal-point/116896/2 "2024-07-12T08:18:57Z")

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Hi,  
Jacobian of the objective and/or the constraints ?

Is it a documented feature of Ipopt itself?

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**Author:** ![odow](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/odow/32/28685_2.png) [@odow](https://discourse.julialang.org/u/odow)\
**Post date:** [July 13, 2024, 12:16am UTC](https://discourse.julialang.org/t/jump-ipopt-is-it-possibe-to-retrieve-the-numerical-jacobian-at-the-optimal-point/116896/3 "2024-07-13T00:16:45Z")

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See

> **[Computing Hessians · JuMP](https://jump.dev/JuMP.jl/dev/tutorials/nonlinear/querying_hessians/#Jacobians)**
>
> Documentation for JuMP.

(This section is a recent addition, which is why it is only in the `/dev` docs; we haven’t tagged a new version of JuMP yet.)