Brannon King

I didn't realize that there was a global environment! That's fantastic – just what I needed. As for the other two issues, relax not getting env and the flag combination, I cannot reproduce those is...

Also, I want to note that calling the relax() method on a model does not pass the Env to the new model, but it should.

This question is old, but so as it has an answer: you can't use numpy functions on scipy sparse objects. The transpose should be sH.T and the dot product should be done via the @ operator: sH @ D . 

Each row has an associated slack variable. Does the slack variable use the same upper/lower status information? How would I determine this VBasis information for a slack variable, since CBasis does...

Surely Gurobi's nodes know both their parent and their variable that they branched on, no?

Yes, I too really need a way to determine what variables Gurobi has already fixed as part of its branching. This information should be available in the node or solution callback. Even if it was jus...