Marilena Zambara
- Total activity 18
- Last activity
- Member since
- Following 0 users
- Followed by 0 users
- Votes 1
- Subscriptions 4
Activity overview
Latest activity by Marilena Zambara-
Marilena Zambara commented,
Many thanks Riley for the very useful info. Best, Marilena
-
Marilena Zambara commented,
Hi again, and Happy New Year!I have a follow-up question on this issue. Communication with Julia developers indicated that as long as a feasible solution is available at the time of early terminati...
-
Marilena Zambara commented,
Indeed, I can retrieve the values I need with MOI.get(grb, Gurobi.VariableAttribute("X"), index(my_x))Therefore, if I attempt to explain what is happening is that the solution is there from Gurobi,...
-
Marilena Zambara commented,
Hi Riley, Gurobi version is 11.0.2. I am using Julia v1.9.3 and JuMP v1.23.2 with the Gurobi.jl wrapper v1.3.1.Below you can see the gurobi log for a test case where I am setting a time limit of 4....
-
Marilena Zambara created a post,
Terminating barrier with TimeLimit provides no solution
AnsweredHello to the community, I am setting the TimeLimit parameter to an LP, with Method = 2,. The time limit is respected, but I am unable to retrieve any values for my variables. I would expect that I...
-
Marilena Zambara commented,
Great, thanks again. Marilena
-
Marilena Zambara commented,
Hi Riley, and thanks for your answer.Could you please clarify, does this mean that the answer to my original question - retrieving duals during branch and bound - is “No, it is not possible”?If it ...
-
Marilena Zambara created a post,
Retrieve Pi values from the LP relaxation of a MIP problem with JuMP
AnsweredHello!I would like to retrieve dual values of the LP relaxation of my MIP problem, that is being solved during B&B.To give you a bit of context; I am using Julia and JuMP (and Gurobi of course) to ...
-
Marilena Zambara commented,
I have performed further tests with a Bender's decomposition algorithm with feasibility cuts (thus, with occasions that the slave problems are infeasible) and I have made some observations, the rea...
-
Marilena Zambara commented,
Dear Riley, Thank you very much for your answer! Indeed, you are right. With presolve on I can still retrieve the information I need. You are also right in that I can use the concurrent method and ...