Maliheh Aramon

Hi Teemu,  Any restriction on the values the decision variables can take should be formulated via adding constraints to the model. The Gurobi Python MVar object does not support methods such as so...

Hi Zvonimir,  As mentioned in our documentation, the Model.addConstrs() method returns a tupledict where the constraints are indexed by the values of the generator expression. In your code, I guess...

Hi Maik,    Copying your snippet in Python gives me a different error message:  gurobipy.GurobiError: Variable has not yet been added to the model   The reason is that the sum is over \(\texttt{di...

Hi Yutian,  Gurobi solves an instance of non-convex QCP problem to optimality. Please note that the default value of the NonConvex parameter is changed to 2 starting from Gurobi version 11.0.0. The...

Hi,  When F=set(range(1, 2), the result CC is 1, but when F=set(range(1, 3), the result CC is 2, if the range of F is further expanded, then CC does not change, and it is still 2 I am not sure I ...

Hi Yashass,  Please check the articles below for the full instructions on how to install Gurobi Optimizer for R: How do I install Gurobi Optimizer? How do I install Gurobi for R? Make sure to set...

Hi,  See the article How do I instruct Gurobi to produce a log file?  When using one of Gurobi APIs, you would need to explicitly specify the log file name via setting the parameter LogFile. The Gu...

Hi Alexander,  Crossover computes an optimal vertex solution (an optimal basis) from an interior solution. The crossover is by default enabled and it can be time-consuming specifically on models wh...

Please checkout the article How does presolve work?.

Hi,  Yes, the \(\texttt{quicksum}\) is a gurobipy global function and the \(\texttt{sum}\) is a python function. The \(\texttt{quicksum}\) is a version of the \(\texttt{sum}\) function and it is fa...