Yamin Wang

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Latest activity by Yamin Wang
  • Yamin Wang created a post,

    Performance difference of two formulations


    x is continuous variable, ix, i1,i2 and i3 are binary variables. Constant is a constant Formulation 1: x <= [1- (i1+i2+i3)]*Constant Formulation 2: ix= i1+i2+i3 x<=(1-ix)*Constant Question 1: Does ...

  • Yamin Wang created a post,

    Got different results for the same case in two different platforms.


    I have two different platforms (these two platforms locate on different serve) to execute Gurobi and solve a MIP problem. When I set the absolute gap = 0 and relative gap tolerance is a positive nu...

  • Yamin Wang created a post,

    How to get Unique Solutions to Linear Programs in different execution


    In my different runs of Gurobi solving, the orders of constraints or variables we sent to Gurobi are different because I use multi-threading techniques. So in each execution, I got a different solu...