Same relaxed solution every time

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Samuele Valperta

2024年05月16日 15:50 編集済み

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Hello guys,

not sure if this is the right place to ask something like this but maybe I found people which like solving other person problem xD.

I'm doing an exercise for school and I'm having problem finding the max and min value that tau[2] can have to keep the relaxed problem optimal base the same.

I noticed that for every value I assign to tau[2] I get always the same solution of the relaxed.

Here's my code  (I also made a branch called Debug which should print the relaxed optimal solution)

My question is: Am I missing something about Gurobi library or is this just some theory lack?

関連

• Relaxation
• Java
• Sensitivity

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• 正式なコメント

  

  Simranjit Kaur

  • Gurobi Staff

  2026年11月13日 01:24

  This post is more than two years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum, or try Gurobot, our chatbot interface offering instant, expert-level support.
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  Maliheh Aramon

  • Gurobi Staff

  2024年05月17日 22:51

  Hi,

  I am not sure that I fully understand your question. You can query Gurobi sensitivity information on a Gurobi variable via the attributes below:

  • SALBLow and SALBUp: smallest and largest lower bound value at which the current optimal basis remains optimal.
  • SAUBLow and SAUBUp: smallest and largest upper bound value at which the current optimal basis remains optimal.

  Best regards,

  Maliheh

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