Barak Gross

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Latest activity by Barak Gross
  • Barak Gross commented,

    BTW, I tried the following:* Saving all lazy constraints* Created a constraint : OBJ <= CORRECT BOUND* Found n - the first time that adding the OBJ constraint and the first n lazy constraint became...

  • Barak Gross created a post,

    Debugging wrong MIPSOL_OBJBND

    I have modeled some graph problem in which I add graphs cuts as a lazy constraint.For some reason after some number of iterations the algorithm deduce a bound for MIPSOL_OBJBND that is incorrect.I ...

  • Barak Gross created a post,

    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...

  • Barak Gross created a post,

    Constant Variable


    I have some ILP formulation I came up.It is very convenient in my formulation to have some binary ( maybe even integer) variables that are constant. For example a parity variable that for a specifi...