How to improve LP formulation using presolve
I have written an Integer Program using the Gurobi Python API and noticed the following row in the log:
Presolve removed 9331080 rows and 2671 columns - which took about 35 seconds.
I know for sure that I won't be able to change my formulation resulting in 0 presolve time, but I want to reduce it, and I feel that in my case it is possible.
From what I see a *lot* of rows are deleted (almost 9.5M), is there a way to check what rows/columns are removed? I suspect that this will help me identify redundant inequalities.
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Hi Barak,
How many rows and columns does the original model have? Can you post the corresponding log line?
Thanks,
Sonja
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