Hendrik Weber
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Activity overview
Latest activity by Hendrik Weber-
Hendrik Weber commented,
Hey Manie, most of the things I do are also based on trial and error, so please take this with a grain of salt.One quick fix would be to also use quicksum and only sum over Q_S[t,n,d,y] using the l...
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Hendrik Weber commented,
Ah yes, thank you so much for the quick response. I probably should have read the documentation first :)Thanks!Hendrik
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Hendrik Weber commented,
Hey Maniesegaran, I see this question very often and I always refer to this video then: https://youtu.be/aKsfqB-ONfk?t=1686 I have linked to the part "sparsity done right", I found it very helpful...
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Hendrik Weber created a post,
What happens after root relaxation has been solved? Long time before exploring further nodes according to log
AnsweredHello Gurobi Team! I have a quick question: What happens in the MIP-log after the root node has been solved?[I provide (parts of) the logfile and a screen shot below] My intuition would be that the...
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Hendrik Weber commented,
Hello Jaromił, thank you so much for your help. Yes, we have encountered cases in the computational study where we were prompted with "Warning: Markowitz tolerance tightened to...". The coefficient...
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Hendrik Weber commented,
Hello Jaromił, Thank you for your immediate answer. Here are the "first parts" of the output logs. Please excuse the lack of formatting: ________________________________ Without providing incumbent...
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Hendrik Weber created a post,
Providing integer start solution drastically increases root relaxation computation time
AnsweredHello Gurobi-Team, I am encountering an issues that I am currently further investigating: We are attempting to solve a MIP, however the convergence behaviour was unsatisfactory (with the given time...
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Hendrik Weber commented,
Clean and easy solution, thanks for the help, Eli. I also did another change: I explicitly declared the decision variables that appear in the objective function as Integer. [I previously did not do...
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Hendrik Weber created a post,
Updating of Best Bound based on integrality of objective function value (due to integer coefficients and integer decision variables)
AnsweredHello Gurobi community, We are currently solving a MILP (minimisation problem) where all objective function coefficients are integral. Furthermore, we require decision variables to be integer as we...