# Rewriting JuMP code in MathOptInterface

**URL:** <https://discourse.julialang.org/t/rewriting-jump-code-in-mathoptinterface/42061>\
**Category:** Optimization (Mathematical)\
**Created:** [June 25, 2020, 7:09pm UTC](https://discourse.julialang.org/t/rewriting-jump-code-in-mathoptinterface/42061 "2020-06-25T19:09:36Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![GeneralPoxter](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/generalpoxter/32/17695_2.png) [@GeneralPoxter](https://discourse.julialang.org/u/GeneralPoxter)\
**Post date:** [June 25, 2020, 8:59pm UTC](https://discourse.julialang.org/t/rewriting-jump-code-in-mathoptinterface/42061/4 "2020-06-25T20:59:17Z")

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I was working off of a suggestion from my previous question [Rational{Int64} variables in JuMP?](https://discourse.julialang.org/t/rational-int64-variables-in-jump/42048) to use the CDDLib.Optimizer, which according to [JuMP Documentation](https://jump.dev/JuMP.jl/stable/installation/), requires directly implementing from MOI.

I may have misread the instructions though and could use some help clearing things up regarding whether rational fraction arithmetic from CDDLib can be used in JuMP.

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