# DifferentialEquations.jl look at the ODEsystem

**URL:** <https://discourse.julialang.org/t/differentialequations-jl-look-at-the-odesystem/95131>\
**Category:** General Usage\
**Created:** [February 24, 2023, 12:46pm UTC](https://discourse.julialang.org/t/differentialequations-jl-look-at-the-odesystem/95131 "2023-02-24T12:46:34Z")\
**Posts on this page:** 1\
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**Author:** ![ChrisRackauckas](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/chrisrackauckas/32/77_2.png) [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)\
**Post date:** [February 24, 2023, 1:48pm UTC](https://discourse.julialang.org/t/differentialequations-jl-look-at-the-odesystem/95131/7 "2023-02-24T13:48:54Z")

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`du` isn’t a matrix. But if you’re looking for the operator, in this case it’s equivalent to the Jacobian, so just calculate the Jacobian.

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