Taner Cokyasar
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Activity overview
Latest activity by Taner Cokyasar-
Taner Cokyasar commented,
Hi Jaromił, Thanks for your response. BestBdStop does not work because I cannot guess a good value for it. The below log shows an example termination with a time limit. The gap is 100% because a Be...
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Taner Cokyasar created a post,
Terminate when the first BestBd is found
AnsweredI am trying to find the optimality gap of a solution (retrieved from a heuristic). Briefly, my procedure is: 1) find a heuristic solution, 2) feed the solution into Gurobipy MIP formulation as a st...
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Taner Cokyasar created a post,
Two-type VRP
I am trying to formulate a VRP for two types of vehicles and a single depot. V1 represents, say EVs, and V2 represents gas-fueled vehicles. V1-type vehicles consume less fuel/energy in the first M ...
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Taner Cokyasar commented,
Hey Eli, I love your tsp.py-like vrp.py programming. I think tsp.py should address the word "symmetric" somewhere to make it understandable. In the vrp.py case, you have already defined the model f...
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Taner Cokyasar commented,
@Yauhen, it was all my bad. My solution was not really feasible. I thought it was a feasible solution and was wrong. Thanks to Daniel, I could verify it.
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Taner Cokyasar created a post,
Getting time values shown in the prints
AnsweredIs there any way in Python to record the time MIP start produces a solution. For example, how can I get 0.11s printed? Also, is there any way to get the time values for root relaxation and presolve...
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Taner Cokyasar created a post,
MIP start did not produce a new incumbent solution
AnsweredI have seen this title has been used before (in Gurobi Google Groups) but I could not find a satisfying response for my specific issue. I am trying to solve a MIP with two sets of variables: x[v] a...
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Taner Cokyasar commented,
Hi Tobias, I really appreciate for the response. I have a follow up question though. I was looking at the 'indicator constraints' of Gurobi. Does Gurobi convert indicator constraints (if ..., then....
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Taner Cokyasar created a post,
Gurobi Coding Use for other solvers
AnsweredHello, I wonder if we can run models constructed by Gurobi's coding convention (in Python) using other open source solvers, e.g., GLPK? More clearly, assume I have a MIP model programmed and ready ...