Comments (3)
tkoolen
commented on August 16, 2024
Knitro.jl's eval_h_cb callback for comparison: https://github.com/JuliaOpt/KNITRO.jl/blob/master/src/KnitroSolverInterface.jl#L180.
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mlubin
commented on August 16, 2024
Ipopt definitely handles this correctly. JuMP takes full advantage of it.
http://www.coin-or.org/Ipopt/documentation/node38.html#app.triplet
"The individual elements of the matrix can be listed in any order, and if there are multiple items for the same nonzero position, the values provided for those positions are added."
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tkoolen
commented on August 16, 2024
Alright, my mistake, thank you; then I guess something else is wrong in my code.
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