Thomas Opfer

Do both processors have the same single-core performance (base frequency/turbo frequency)?

Hmm, I guess only someone who knows internals of Gurobi can give an adequate answer. I do not really expect such a behaviour. Does this also happen if you set DualReductions (and maybe PreDual) to ...

Hi Robert, did you read the article that Greg mentioned? Gurobi solves a mathematical program. In this mathematical program, 9.70E-12 is a solution that is considered integer feasible. A mathematic...

I fully agree that this is dangerous and Gurobi should not do the rounding, but in the end, one needs a decision. True or false, 1 or 0 (not 9.7e-12 * true). Your article also says: "Our recommenda...

9.70E-12 means 9.7 * 10^-12 which is 0.0000000000097. So you should better assume 0 instead of 1 :-) Just round the values you receive.

See https://www.gurobi.com/documentation/8.1/refman/intfeastol.html 

Ah, I see. You are calling: r.RCs.RCz.RC I guess, this should be something like: r.getAttr(GRB.Attr.RC)s.getAttr(GRB.Attr.RC)z.getAttr(GRB.Attr.RC)

Concerning your question about integer variables: There are no (trivial) duals / reduced costs in MIPs. What you might want to do is to fix the integer solution and solve the remaining LP. Concerni...

The documentation says: The MIP solver will terminate (with an optimal result) when the gap between the lower and upper objective bound is less than MIPGap times the absolute value of the upper bo...

Hi David, to solve the problem with the shared object, it should be sufficient to add the path where the .so-files are located to the environment variable LD_LIBRARY_PATH, e.g. export LD_LIBRARY_PA...