Presolve information

Answered

Alejandro Arenas

• August 23, 2021 21:17

Hi there.

At the moment I am performing a polyhedral study in a VRP model. To avoid adding new cuts to the model which are already implemented in presolve(), ¿is there any manual to know which cuts do presolve include?

Thank you very much.

Att: an streesed PhD. student.

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• Official comment

  

  Simranjit Kaur

  Gurobi Staff

  • December 06, 2024 00:27

  This post is more than three 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 why not try our AI Gurobot?.
• 

  Jaromił Najman

  Gurobi Staff

  • August 24, 2021 07:18

  Hi Alejandro,

  It is not possible to check which types of cuts have been added in presolve. Gurobi provides a summary of all cutting planes at the end of the solution process so this might give you an idea of which cuts are added during the optimization process.

  In general, it is recommended to add specialized cuts if you have knowledge of any for your problem. You could experiment with a small instance of your problem to check whether your cuts have any impact on the solution process. Alternatively, you can turn off presolve via the Presolve parameter and turn of all cutting planes via the Cuts parameter. There are additional cut parameters (e.g., FlowCoverCuts) to provide a more finegrained control of cutting planes.

  Best regards,
  Jaromił

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