Arezoo Jafari

Hi Maliheh,   I appreciate your help.  What do you mean by using the solution of the subproblem and solving the master problem? It is unclear because the decision variables in the subproblem differ...

Hi Maliheh, Thank you so much for your response. It was super helpful.  When I use the variable attribute Start to fix a subset of variables to starting values, I get the same objective value.  I n...

Thanks for your response. It seems that you read all decision variables from "MP.sol" and add them to the first iteration in the Master problem. But I force the model to get similar values only f...

Hi sorry for that. I accepted it.Please let me know if you have any trouble accessing that. 

Hi Malileh,  Thanks for your help. I created a folder on GoogleDrive. The link is here: https://drive.google.com/drive/folders/1UfyCL62lALr4di1Y8St14Uwmyu_SkQMk?usp=sharing  Thank you!

Hi Greg, I noticed your post regarding "Is Gurobi Optimizer deterministic" and you mentioned that  --> "if you change any inputs, including small changes like: Parameter values Rounding of coeffic...

Thank you for your help. I really appreciate that. Yes, the presolve fixes the variables X and continues finding the optimal values for the other decision variables. I also used model.write("soluti...

Hi Maliheh, Thank you so much for your response. Yes, I solved the model twice with the exact same input and parameters but the objective function is not the same. As you advised, I kept the defaul...

As I have a two-stage model, it is divided into primal model (master problem) and dual problem (dual sub problem). I just added model.Params.OptimalityTol = 1e-03 and model.Params.Method = 0 to the...