MILP bilinear constraints

Awaiting user input

Nick Fryganiotis

• November 06, 2024 14:34

I have a mixed integer linear program. My objective function involves the sumation of binary variables and quadratic terms of continuous variables. When i execute the model optimize function i get that the presolved model has bilinear contstraints, but when i execute  m.getQConstrs() i get an empty list, which is the expected as i do not add bilinear constraints on my model, and i don't want to solve it as a non-convex problem. 

Related to

• Bilinear

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  Riley Clement

  Gurobi Staff

  • November 06, 2024 22:25

  Hi Nick,

  Do you see a difference if you run m.update() prior to m.getQConstrs() ?

  - Riley

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  Nick Fryganiotis

  • November 06, 2024 22:31

  

  

  Hi Riley,

  thanks for the answer. In my source code m.update() is prior to m.getQConstrs().

  - Nikos

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  Riley Clement

  Gurobi Staff

  • November 06, 2024 23:33

  Hi Nick,

  You mentioned that you don't want to solve it as a nonconvex problem. Are you sure your model is convex? Have you got a formulation you can share?

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