Martina Gherardi

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Recent activity by Martina Gherardi Recent activity Votes

  • MIP start and Heuristic callback

    Answered

    Hi, I would like to receive a message about constraint violation when using heuristic callback. When I warm start the model, if there is an infeasibility, I obtain   user MIP start violates constra...

    Martina Gherardi 2 followers 1 comment 0 votes

  • Usercuts in the root node with Gurobi Callback

    Awaiting user input

    Hi,  I would like to add user cuts in the root node using Julia. With the code cb_calls = Cint[] function my_callback_function(cb_data, cb_where::Cint) push!(cb_calls, cb_where) if cb_where != ...

    Martina Gherardi 2 followers 3 comments 0 votes

  • Warm start Non-Convex Quadratic Optimization in GAMS

    Answered

    Hi,  I am trying to warm-start a model with bilinear constraints and continuous variables to the locally optimal solution found with IPOPT.  Accorded to  https://support.gurobi.com/hc/en-us/communi...

    Martina Gherardi 2 followers 1 comment 0 votes

  • Nonconvex=2 and Presolve

    Answered

    Hi,  I have a problem that contains 9 bilinear constraints: each constraint has a product of 2 continuous variables. Note that the problem has only continuous variables.  I modeled the problem in G...

    Martina Gherardi 2 followers 5 comments 0 votes