# Integer optimisation with user's multivariate functions: Possible in Julia?

**URL:** <https://discourse.julialang.org/t/integer-optimisation-with-users-multivariate-functions-possible-in-julia/17924>\
**Category:** Optimization (Mathematical)\
**Tags:** jump, optimization\
**Created:** [November 23, 2018, 7:23pm UTC](https://discourse.julialang.org/t/integer-optimisation-with-users-multivariate-functions-possible-in-julia/17924 "2018-11-23T19:23:33Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![jacob-roth](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jacob-roth/32/1862_2.png) [@jacob-roth](https://discourse.julialang.org/u/jacob-roth)\
**Post date:** [May 5, 2019, 11:24pm UTC](https://discourse.julialang.org/t/integer-optimisation-with-users-multivariate-functions-possible-in-julia/17924/9 "2019-05-05T23:24:47Z")

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@Olegg: I may have a similar problem [here](https://discourse.julialang.org/t/encode-matrix-function-which-depends-on-optimization-variables-at-each-step/23831/6) where I want to define constraints in JuMP involving matrix `inv`s. Would you mind sharing how you registered a multivariate function / derivative? Or did you find an alternative approach?

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