Suppose you have using JuMP,Ipopt model = Model(Ipopt.Optimizer) n = 5 @variable(model, X[1:n, 1:n]) What is the easiest way to impose that the elements of main diagonal of X are identical. No restriction on what they are, they just need to be identical. That is X[1,1] = X[2,2] = … = X[n,n]

Identical diagonal elements

odow July 7, 2023, 2:01am 7

You need == for an equality constraint, not =.

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