A.Omidi
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Latest activity by A.Omidi
A.Omidi commented,
Dear Jaromil, Many thanks for your explanation. I have just updated it. Regards Abbas

A.Omidi commented,
Dear Eli, Many thanks for your detailed explanation. I can do that for modifying my model and it works fine. :) Would you say please, how you can use LaTex in your comments? I tried it but, it seem...

A.Omidi created a post,
Linearizing factorial function
AnsweredDear community team, I'm trying to write a constraint in the following form: $$(a_j * (s_j!)) / L \leq 1\gamma$$ Where \(\texttt{a}\) and \(\texttt{gamma}\) are constants and \(\texttt{s}\) and \(...

A.Omidi created a post,
Using Gurobi heuristic parameter to achieve a feasible solution
AnsweredDear support team, I'm working on an optimization problem (MIP) which in the medium/large scale takes too much time to solve optimality. Then I tried to use Gurobi heuristic parameter to invoke a f...

A.Omidi created a post,
MIPHeuristic as a MIPstart
AnsweredDear support team, I'm trying to solve a scheduling problem using Gurobi 9. The model is solved and the optimal solution is found. Now, I would like to use a heuristic (which an instance could be...

A.Omidi created a post,
Gurobi NEOS issue
AnsweredDear support team, I'm trying to solve a large scale optimization problem using Gurobi solver (V.9) on my local machine. As I have not accessed to an academic licence for Gurobi, I will need to u...

A.Omidi commented,
Many thanks for your detailed explanations. Regards

A.Omidi created a post,
Special knapsack problem
AnsweredDear community team, I have tried to solve a special knapsack problem which contains an inequality with binary parameters. AFAIK, cover cuts families can be applied to solve the standard knapsack ...

A.Omidi commented,
Dear Eli, Thanks so much for your detailed explanation. I can do that. Regards

A.Omidi commented,
Hi, With thanks for your useful comment, I try to use you mentioned parameters. I'm using Gurobi Java API. The parameters are set as follows: model.set(GRB.IntParam.PreCrush, 1);model.set(GRB.IntP...