Vida Yousefinezhad
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Recent activity by Vida Yousefinezhad-
Mixed integer programming
AnsweredHello everyone. I am solving a mixed integer programming model in Python with Gurobi package. Recently, I came across sth that is not logical to me. I have continuous and binary decision variables....
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I'm encountering "The kernel appears to have died. It will restart automatically" error while solving an MIP model
AnsweredI am trying to solve a large scale MIP model in web-based Jupyter notebook environment. After about 12 hours the error appeared. Also, the solving process is very slow and it seems too long (e.g., ...
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taking too long from 0.08% Gap to 0% while solving a MIP in Python with Gurobi package
OngoingI am solving a MIP problem in Python. The solving process with branch and bound proceeds very fast at the beginning, but when the optimality gap reaches 0.08% the opposite happens. I mean from 0.08...
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Out of Memory Problem
AnsweredHi everyone! I am solving a MIP model in Python with the Gurobi package. I encountered an "Out of memory" error after 2000 seconds and did not know how to deal with it. I just read an article on yo...
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Algorithm
AnsweredHi everyone! I have a question about coding in Python with the Gurobi package. I am coding an algorithm. In each iteration, there is a constraint (constraint_90 in the master problem) in which the ...
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Indicator day of week
OngoingHi everyone! I am using a forecasting model and want to code the following: mu is a coefficient of I. V is the Day of the week (V: = {Mon, Tue, ..., Sun}). I(Φ(t)=v) is the indicator function and ...
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IIS infeasible
AnsweredHi, I have a maximization problem, which is infeasible (status: 4) in Python with the Gurobi package. Then, I tried to do IIS infeasible to find out the constraints that make the model infeasible. ...