Maliheh Aramon

Hi,  To run the NoRel heuristic, you must set either NoRelHeurTime or NoRelHeurWork parameters. You can set the NoRelHeurTime parameter to a large value and the SolutionLimit parameter to 1. This w...

Hi,  The MIPGap attribute is available when the optimization is terminated because of hitting a termination criterion or proving the optimality. This attribute reports the relative gap between the ...

You need to add the following constraints where \(M\) is a sufficiently large value covering the domain of the \(Y\) variables. \(Y_i \leq X_i + MZ_i\) \(Y_i \geq X_i - MZ_i\)

Hi Sesha,  The results look consistent with the constraints implemented. The variable \(X_{11,00}\) equals a non-zero value (\(0.333\)) and its associated \(Y_{11,00}\) variable equals \(76\) such ...

Hi Claire, Some general recommendations you could consider experimenting with: Use the latest Gurobi version 11.0.2. Leave the Threads parameter at the default value Consider more aggressive preso...

Unfortunately, that is not the constraint that I want to implemt. Could you please write the mathematical formulation of the constraint you would like to implement? The previous post implements t...

Hi Florian,  Whether an MILP instance is easier to solve than an MIQP instance (quadratic objective with linear constraints) depends on several factors that are difficult to predict in advance. The...

Hi Sesha,  Do you like to implement the constraint below?\[\mbox{if} ~~ X_i \neq 0, \mbox{then}~~ X_i Y_i \geq 0.001, ~~ i=0, \cdots, n\] Assuming \(X\) and \(Y\) are continuous variables, you woul...

Hi Nicolas,  Since this is a license issue, I’ve created a ticket in our Help Center and will reach out to you shortly through the ticket. Best regards, Maliheh

Hi Panca, Our development team reviewed your case, and I’m writing to update you with their feedback: The capacity inequalities added via callbacks in your application are indeed lazy constraints b...