Iason Liagkas

Hello guys, in a problem I run I get results. The algorithm used is dual simplex. Some repetitions produce infeasibility in the obj function but the final solution has a gap of 0%. This is the resu...

Hello guys, I used the code to write my model model.write('my_iis.ilp') In the file the objective function formula seems to be distorted:  The code that defines the objective function is: #objecti...

Hello people, how can we use the IIS variable bounds to determine infeasibility (if we can)? Should they be the same as what we set in our code in order not to cause any problems?Kind regardsIason

Hello guys, I am getting this message: Do you have anything to suggest? Is there any comment about my number of variables or constraints? Do you think my program is too big to be feasible? I just d...

Hello guys, I am trying to program a constraint of y=ln(x) but x,y have parameters. Could you help me with this code by an example? Do I need Python 10 for this? I am on 9.5 currently. Say I want t...

Hello guys, is there any way that I can convert a typical python dictionary to tupledict? Kind regardsIason

Hello guys, I want to write a constraint that has a sum. In the sum, a variable is multiplied by an index parameter that is either 1 or 0. I think there are 2 ways to make this happen. The first is...

Hi Guys I'm in a hurry. Do you know where could I find benders decomposition examples with Python? any help appreciated. 

Hi Guys, are there any tutorials on Python on Branch and Bound with Gurobi? 

Hello guys, on this guide https://cdn.gurobi.com/wp-content/plugins/hd_documentations/documentation/9.0/quickstart_windows.pdf    p.g. 83 has an example. Could you please explain how is the objecti...