Chung-Kyun Han

Hi Joseph, Thank you for reaching out. We recommend you look through our page about Multiple Objectives first.Especially when you read Working With Multiple Objectives page, you can realize how Gur...

Hi Dong Han Thank you for reaching out and sharing the log. Your first question is “why the number of constraints removed during presolve is lager than the number of constraints in the original mod...

Hi Rayan, Thank you for sharing your problem and model file.If you don't mind, please share the model file through other cloud storage services such as Filemail, Dropbox, Box, Google Drive, OneDriv...

Hi İrem,   Thank you for sharing your model. We first share the entire codes representing your mathematical model and then we will add explanations. import gurobipy as gpimport numpy as npresources...

Hi Rayan, We would like to suggest two approaches to validate your model. If you already know a solution having better objective value, fix variables based on the solution and validate the feasibil...

Hi Bhargav Gorantla Sridhar,   Thank you for reaching us. I would like to introduce two approaches that handle intermediate solutions.The simple one is to write .sol file by SolFiles parameter and ...

Hi İrem,   Thank you for reaching us. If you don't mind, could you share the mathematical formulation of the constraint you want to add?I mean, the following constraint. for i in range(resources): ...

Hi Rayan, Thank you for reaching us.I'm happy to support you again :D Could you give us more information about why you consider the solution wrong?Do you already know a feasible solution whose obje...

Hi Andrea, Thank you for reaching us. Suppose you don't call m.model(), you cannot check your modification on the variables' attributes directly.Try the below code. for v in y:    v.setAttr('Branch...

Thank you for reaching us. The default lower bound of a variable is zero (please refer to our manual about Model.addVar()).If you add variables like as follows, you will get the optimal solution yo...