yansong bai

Gurobi version is 9.1.2 and Python is 3.7. The environment used is PyCharm.

Hi, Jaromił Thank you for your prompt reply.  import numpy as npimport gurobipy as gpfrom gurobipy import GRBmodel = gp.Model('test')x = model.addVars(1,4,vtype=GRB.BINARY,name='x')y = model.addVar...

Hi,Mario Yes, i export the model with write. \ LP format - for model browsing. Use MPS format to capture full model detail.Maximize....Subject ToR0: ai[0,0] = 1.....(the constraints are omitted)R66...

Thank you very much for your prompt reply. It means if i don't set the lb or ub bound for a variable, the default value is 0?  But when i export the model corresponding to the first code and the th...

Thank you for your answers, Matthias.

Thank you for these valuable reply. I will have a try to test these.

Thank you for this valuable advice. I will have a try.

Dear Jaromił, Thank you for your reply, I didn't express it clear just now. At first,I tried to select the proper parameters(for example,if the MIPFocus is set to 3), the log file is something like...

Dear Jaromił,     Thank you for your valuable reply. I have tried to change the parameters,like MIPFocus, ImproveStartGap, etc.However, I find the solving time has little change. I tried to change ...

Hi, Thanks a lot for the helpful comments GUROBI provided above,I have a similar problem for speeding up the solving process in GUROBI. The model established is based on Yalmip toolbox in MATLAB en...