Gleb Belov

  • Gurobi-versary
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Posts

Recent activity by Gleb Belov Recent activity Votes

  • Branch-cut(-price) node LP warm start

    Hi, assume someone implements branch-and-cut... and needs to solve the LP relaxations in different nodes. This means, after solving the LP of one node, we can switch to a very different node (diffe...

    Gleb Belov 2 followers 1 comment 0 votes

  • QCP duals

    Answered

    Hi, when retrieving duals of linear and quadratic constraints, I noticed that methods GRBgetdblattr(element) interpret the indices as the indices in the subset of only quadratic constraints, or, if...

    Gleb Belov 2 followers 2 comments 0 votes

  • ObjBoundC not available

    Answered

    Hi, when solving a simple quadratic model, Gurobi finishes at root node. Then, trying to retrieve ObjBoundC, we get Unable to retrieve attribute 'ObjBoundC'.Failed to get the best bound. Gurobi err...

    Gleb Belov 4 followers 4 comments 0 votes

  • Exporting parameter list

    For a modeling system like MiniZinc it would be useful to see the list of parameters supported by the solver. There are functions in gurobi.h allowing access to the list and feasible/default values...

    Gleb Belov 2 followers 1 comment 0 votes

  • Bug report: infeasible with 1 thread

    Answered

    Infeasibility reported when solving with 1 thread, but without the thread option, a feasible solution is found in 1 second. Platform: Debian 9.9, i7-4771 Instance: https://www.dropbox.com/s/v8h1obs...

    Gleb Belov 4 followers 7 comments 0 votes