Benedicte Rimmereid

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Recent activity by Benedicte Rimmereid Recent activity Votes
  • Dual values of MIP


    Hi, We are investigating dual variables from MIP problems by first solving an original MIP problem, then fixing the solution of the integer variables and solving a corresponding linear program. We ...

  • Retriving dual values from relaxed MIP


    Hi,  I have defined a MIP model that solves a unit-commitment problem. I have first tried the fixed()-method to retrieve the dual values. Now, I want to do the same through relaxing the binary mode...

  • Sensitivity analysis, quadratic constraints


    I have a model that initially contained SOS constraints and quadratic constraints, on which I want to conduct a sensitivity analysis. First I used the fixed method to fix the SOS and then I tried t...

  • Retrive attribute Pi

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    I have a pure linear model, but I cannot retrieve the dual value (Pi). Are there any common reasons why this might happen? See my code below, for it only tries to retrieve the dual values in the ca...