Hi There. At work i encounter a lot of "SOS' type problems - mostly when i want to model "choose exactly one member of a group". Currently I model this with binary variables, whose sum i constraint to be less than 1. Modeling this using SOS seems like a better approach- more compact, and also could yield better MIP results. Are SOS's supported in glpk? If not, any reason why?
Thanks Kretch
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