Mathieu Besançon

R data file with non-standard extension is recognized as generic GZip file.

5

MWE: ```julia ]add RData import RData RData.load("dat.Rda") Error encountered while loading "path_to_dat.Rda". Fatal error: ERROR: ArgumentError: Package Libz not found in current path: - Run `import Pkg; Pkg.add("Libz")` to install...

instead of always refetching all solutions, creates and stores the vector once after solve

VectorOfVariable with indicator does not detect binary variable

4

From https://github.com/jump-dev/JuMP.jl/issues/2167 When copying the indicator constraint, the binary is sometimes not already set (comes from `copy_to` not being ordered). MWE from JuMP: ```julia using JuMP import SCIP using LinearAlgebra:...

SCIP has a range of combinatorial or non-linear constraints that might be interesting to users and should be exposed at the MOI level by defining custom sets (ideally) or functions

It could be great to expose the Benders decomposition API at the Julia level, not sure yet how this can be done

Add SCIP support

5

SCIP is one of the commonly-used MI(N)LP solvers and could be of interest to the rust-or communities (free and source available for academic use). I'd be willing to help add...

FileFormats.MPS: indicator constraint support

1

The error occurred when loading the MIPLIB instance `allcolor58.mps.gz` into MOI: ```julia ERROR: LoadError: MathOptInterface.UnsupportedConstraint{MathOptInterface.VectorAffineFunction{Float64}, MathOptInterface.Indicator{MathOptInterface.ACTIVATE_ON_ONE, MathOptInterface.EqualTo{Float64}}}: `MathOptInterface.VectorAffineFunction{Float64}`-in-`MathOptInterface.Indicator{MathOptInterface.ACTIVATE_ON_ONE, MathOptInterface.EqualTo{Float64}}` constraint is not supported by the model. Stacktrace: [1] add_constraint(model::MathOptInterface.FileFormats.MPS.ModelFunctionConstraints{Float64}, func::MathOptInterface.VectorAffineFunction{Float64},...

Even though `@recipe function f(m::JuMP.Model)` is practical to have in some cases, it should not be there since we are hijacking the behaviour of JuMP.Model (type piracy)

```julia const exp_obj1 = @expression(mmodel, -y +0.05 * z) const exp_obj2 = @expression(mmodel, 0.05 * y - z) const obj1 = SingleObjective(exp_obj1) const obj2 = SingleObjective(exp_obj2) # setting objectives in...