https://bugs.documentfoundation.org/show_bug.cgi?id=80847
Rafael Lima <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |NOTABUG --- Comment #2 from Rafael Lima <[email protected]> --- > Is there some problem with allowing "not equal"? I would need this condition > in my task sheet :( Linear and non-linear solvers only work with "=", "<=" and ">=" operators. The explanation is a bit complicated, but it comes from the standard representation of mathematical programming models. For instance, Excel solver, OpenSolver for Excel and professional solvers as Gurobi only accept constraints of "=", "<=" and ">=" types. Mathematically you can approximate "<>" constraints adapting your model using the explanation in [1] given by Kuifje, but you'd have first to estimate M. So it is not trivial. [1] https://math.stackexchange.com/questions/37075/how-can-not-equals-be-expressed-as-an-inequality-for-a-linear-programming-model/1517850 Closing this as NOTABUG. -- You are receiving this mail because: You are the assignee for the bug.
