Add nonlinear optimization constraint

Julio Cesar Franco

• December 31, 2019 00:52

Hi, I need to add the following optimization constraint:

Where

and M_j is a decision variable included in the objective function (MINIMIZE).

instead of using the square root of N_j I added a new auxiliar decision variable Nr_j as

Nr_j * Nr_j = N_j but an error occurred:

GurobiError: Invalid argument to QuadExpr multiplication

Does anyone know how to include it, please?

 

Thank you.

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• 

  Jennifer Locke

  Gurobi Staff

  • December 31, 2019 17:38

  What data type is Nr_j and N_j?

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• 

  Julio Cesar Franco

  • December 31, 2019 17:42

  

  

  

  N_j is integer and Nr would be continuous

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• 

  Jennifer Locke

  Gurobi Staff

  • December 31, 2019 20:12

  I should have been more specific, scalar or vector, numpy, sciPy arrays, Mvar?

  Could you also add your code here for us to review? 

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