V priya

Hi, Thank you very much for the references.  One more question: When I vary the fixed parameters, some instances with MIPFocus=3 gives  Root relaxation: numerical trouble, 0 iterations, 0.00 second...

Thank you for the response.I uncommented the following also : mdl.addConstrs( U_a1[i,j]  >= U_lower_bar_a1[i,j] for i in range(0,n) for j in range(0,n))  But I am getting an infeasible model. Could...

Hi  Thank you for the reply. I follow your help and see that: print( rho[0:n].shape) as  (3,) : means there are 3 columns (this is expected)andprint( np.tile(rho[0:n],n).shape) as (3,) : this is s...

Regarding the first point, isn't it better to vectorize a constraint than use a for loop in terms of time ?