Grzegorz Siekaniec

Hello, I have a maximization model with slightly different, but equivalent, formulations:1. Variables have bounds.2. Variables do not have bounds.3. Variables bounds are expressed as constraints. B...

As far as I know, an automatic tuning tool perform its own search procedure through parameter space. It would be nice to be able to guide a search through a specific set of parameters and its value...

The background for my question is that I was implementing Benders decomposition and run into something strange while working on feasibility cuts. I wanted to use Farkas certificate as extreme ray o...

I would like to use a "Var" as dictionary key while building a model. The underlying reason is that I would like to use "bidict" while building a model so I can easily reference "Var" when building...

I would like to suppress direct logging to stdout if logging is enabled. The reason is that for an example below (modified mip.py example): import sysimport loggingimport timefrom gurobipy import *...

Using Python API, what is a preferred way to : 1. Check if variable value in a solution is non zero. 2. Get the list of non-zero variables. For '1' I checked the examples and it does not seem to be...