Maliheh Aramon

Your academic license is already installed on your laptop. To use the license, you do not need to be connected to the internet. You can use the license offline. Therefore, being connected to VPN or...

Thanks for the further clarification.  Sorry, we do not offer one-on-one support to our academic users beyond licensing and installation issues. Even in-depth modeling support is not part of our ty...

Sorry, I missed your previous messages.   For the third constraint you formulated, shouldn't the left side of the equation be 'SUM(Np*p)' with the sum from p=1 to Up? Yes, you are right. I edited...

Hi Tycho,  Let us define upper bounds \(U_s\) and \(U_p\)  for the number of ships and total number of pickups. You would need to use your problem knowledge to come up with a simple heuristic to f...

Hi Tycho,  It is not possible to use Gurobi Var objects as indices because a Gurobi Var object does not have any value associated with it until the model is solved.  To model the relationship as th...

Hi,  You can define an auxiliary variable \(z_{ik} = x_i \land x_k\, ~~ \forall i, k\). The logical And constraints can be implemented using the Model.addGenConstrAnd() method in Gurobi Python API....

Hi,  You can use the BranchPriority attribute to define a branching priority for the subset of variables you are interested in. The variables with larger branching priority values will take priorit...

but still still not make much sense of that one. I am not sure what you mean by saying that the LP file does not make sense to you. It shows your model. For example, you have: minimizeobj: 1 C_4,...

What you have implemented is if \(b = 1\), then \(\mbox{gap} = \mbox{gap_value} - \mbox{target1_value}\). Given the lower bound of 0 for the variable \(\mbox{gap_value}\), the variable \(\mbox{gap}...

Hi Ali,  There is no attribute to directly query the root relaxation value. There are several other alternatives: Gurobi log file includes a message like below at the end of root node solve where ...