Jaromił Najman

Hi, I am not sure if I understand fully understand your issue. It is currently not possible to directly define multivariate polynomials in Gurobi but it is certainly possible to model them. For exa...

Hi Jimmy, I am not sure if I understand your problem correctly. In your code you define \(J\) as a list of integers and \(V\) as a list of strings. I assume the \(J\) list is defined this way due t...

Hi, In order to improve the feasible solution finding process you could start by setting the MIPFocus parameter to 1. You could also try one of the following three: ImproveStartNodes, ImproveStartG...

Hi,Are you sure that subtracting \(\epsilon=1\) from your upper bound is valid? E.g., the optimal objective value of your master problem is \(Z=2\) and the upper bound you get from one of your subp...

Hi Anthony, One way would be to add a constraint to bound your objective, e.g., \(obj \geq myBound\). Note that this is not guaranteed to accelerate the optimization process. You could also try usi...

Hi, Yes, you should only create one set of \(X\) variables as they denote the decision. You could do it with two sets of variables but you would have to enforce equality on each of the variable pai...

Hi, you could use the search on the top right of the Gurobi website. The search results containing a "Model." are the ones for the Python API. Best regards, Jaromił

Hi Enrique, could you test whether Gurobi and your license have been installed properly by executing \(\texttt{gurobi.sh}\) in a terminal window as described here. Best regards, Jaromił

Hi Sergio, could you generate an LP file by using the write() function to double check whether the constraints you construct are correct? I would recommend to reduce the number of elements in the s...

Hi, you could use the add() function as ObjExpr[count].add(LinObjExpr);ObjExpr[count].add(QuadObjExpr); Does this work for you? Best regards, Jaromił