Antonios Georgantas
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Latest activity by Antonios Georgantas
Antonios Georgantas commented,
Dear Mario, I really appreciate these suggestions. I will have a look and I hope that some of them might be able to resolve the current problem I face. Thank you. Antonis

Antonios Georgantas commented,
Hello there, does anybody have an idea why I get such a behavior? Thank you. Antonis

Antonios Georgantas commented,
Mario, maybe I did not express my concern properly. The original optimization problem is a Mixed Integer Nonlinear Program (MINLP). Therefore, the dynamics associated with the traffic simulator hav...

Antonios Georgantas commented,
Hi Mario, I am not sure if you read my response, but do you have any suggestions related to this issue? Antonis

Antonios Georgantas commented,
Hi Mario, I dug into case 2, and I also considered many other cases considering different values of epsilon as input to the solver, and I realized that there were some mistakes in terms of the simu...

Antonios Georgantas commented,
Dear Mario, the difficult part with my simulator is that I cannot find the optimal value of the objective function of interest, since the combinations increase exponentially as I increase the value...

Antonios Georgantas commented,
Hello Mario, I experimented a little bit with the constraints, and I realized that one constraint was the source of the problem for the LP. When I deactivated this constraint, I was able to solve t...

Antonios Georgantas commented,
Hello there, as a side comment relevant to the discussion above, to reduce the number of d.v. and constraints, respectively, I tried to remove the constraints, which contained the binary quantities...

Antonios Georgantas commented,
Dear Mario, thank you for the quick reply. In my present mathematical program, I minimize two objective functions. To cast this in a tractable format, I utilize the εconstraint technique, where I ...

Antonios Georgantas created a post,
Why doesn't objective value improve? Then it acquires enormous value
AnsweredI am solving a MILP with 5788538 rows, 33964001 columns and 20903685 nonzeros. The number of binary variables is 1000. I use Gurobi version 11.0.0 within the Matlab interface.In general, I am deali...