Oscar Dowson

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Latest activity by Oscar Dowson
  • Oscar Dowson created a post,

    Suggest users set `NonConvex = 2` for non-PSD quadratics


    Currently, non-convex quadratics throw "Q not PSD" if "NonConvex != 2". Until the default value is set to 2, the error message should be modified to suggest users try setting "NonConvex=2". For exa...

  • Oscar Dowson commented,

    To follow up, it appears to be an integer feasibility tolerance issue. It seems that v8.1.1 has a tighter tolerance by default, and the "better" solution found by v7.5.2 is actually integer infeasi...

  • Oscar Dowson created a post,

    Different solutions between Gurobi 7.5.2 and 8.1.1


    Dear Gurobi, I have a model that now gets a different solution on Gurobi 8.1.1 compared to Gurobi 7.5.2: Here is the MPS file https://gist.github.com/odow/b00626dad00eba2a00bc93e5bcc03647#file-guro...