Maliheh Aramon

Does it mean, I have to set x to be GRB.INTEGER? Yes, you need to set the decision variables to either binary or integer, depending on your application. Even I define the updated model is the sa...

Hi Muhamad, As explained by my colleague, Jaromił, in your previous post, the guarantee of an integral optimal solution provided by totally unimodular constraint matrices applies strictly to linear...

Hi, I am not sure that I fully understand your question. You can query Gurobi sensitivity information on a Gurobi variable via the attributes below: SALBLow and SALBUp: smallest and largest lower...

Thanks for the clarification. Adding the constraints \(x \geq a_i + b_i - 1\) for every \(i\) ensures the binary variable \(x\) equals 1 if person \(a\) and person \(b\) are both assigned to table ...

Hi Summer,  I have  variable that I want to set to 1 if two other related variables are also 1 Could you specify the value the binary variable \(x\) should assume if at least one of the connected...

Hi Luo,  One idea is to use auxiliary binary variables \(b_1\) and \(b_2\) to model the following: \(b_1 = \begin{cases} 1, ~~ \mbox{if}~ A \geq D+\epsilon \\ 0, ~~ \mbox{if}~ A \leq D \end{cases}...

Hi Benoit,  I see you have already set the FuncNonlinear parameter to 1 to address nonlinear constraints using the dynamic outer-approximation approach.  The common parameters used to speed up the ...

Hi Alexander,  Re-stated, I imagine I just want to know which variables are in the basis. You should query the attribute VBasis on each variable to find its status on the current basis.  ...

Thanks for the clarification.  As mentioned in the documentation of GRBCallback::getNodeRel(), the node relaxation solution can be queried given the following two conditions: The where member vari...

As explained in the documentation of GRBCallback::getNodeRel(), this method can be queried only when the where member variable is equal to GRB_CB_MIPNODE. You cannot use this method with where==GRB...