Same relaxed solution every time

Answered

Samuele Valperta

• May 16, 2024 15:50
• Edited

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?

Related to

• Relaxation
• Java
• Sensitivity

0

• 

  Maliheh Aramon

  Gurobi Staff

  • May 17, 2024 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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