Oscar Dowson comments

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                                            Oscar Dowson

[Nonlinear] detect common subexpressions

Another example is https://github.com/jump-dev/MathOptInterface.jl/issues/2496

[Nonlinear] detect common subexpressions

> doing (2) might have I was imagining that we would ask the user to do this, not JuMP or MathOptIntnerface. > My experience with using DAGs to eliminate common...

[Nonlinear] detect common subexpressions

Closing in favor of https://github.com/jump-dev/JuMP.jl/issues/3738. No need to duplicate our discussions.

WIP: [Utilities] maintain order of variables in default_copy_to

So this, somewhat surprisingly, didn't break any tests. I don't know if that is a good thing or a bad thing... I guess it's because we're completely agnostic to the...

WIP: [Utilities] maintain order of variables in default_copy_to

Okay there are a few failures to look at in solver-tests.

WIP: [Utilities] maintain order of variables in default_copy_to

```Julia using Revise import MathOptInterface as MOI function build_src(M, N, p) src = MOI.Utilities.Model{Float64}() x = MOI.add_variables(src, N) indices = unique(rand(1:N, round(Int, p * N))) ci = MOI.add_constraint.(src, x[indices], MOI.GreaterThan(0.0))...