Jaromił Najman

HI Lukas, A node is postponed if numerical trouble were encountered during the solution of the relaxation of this node. This may be due to very large/small variable bounds or very large/small coeff...

I think what you are looking for is described in the Knowledge Base article How do I play the Burrito Game? under Want to know more about the underlying optimization? In particular, you are probabl...

You can model a division as described in How do I divide by a variable in Gurobi? The log term can be introduced by the addGenConstrLog method. Please note that the addGenConstrLog method takes onl...

In the MPS file you should see a GENCONS section, see MPS format. This should allow you to figure out what the general constraint is. It is similar in an LP file, see LP format,e.g., GC0: C1 = 1 ->...

Hi Muhieddine, Since we are doing a nested loop, does that make the model binary quadratic model? or we only call a model quadratic if there is a multiplication of two decision variables in either...

Hi Pingyuan, The problem is that it takes too much time running the program and I cannot get the right result.  What exactly do you mean by "takes too much time" and "cannot get the right result"...

Hi Yooseung, If I understand your post correctly, your concern is about defining a linear constraint via the quadcon struct. It should be no problem to define a linear constraint via the quadcon st...

So, is it still impossible to use variable x and coeff with different key lengths? No, this is not possible. Is there any other workaround? Or is it okay to just copy the coeff T times? There m...

In this case, you should create an empty column for \(\texttt{newvar}\), because it will not be added to any linear constraints, but still has to be used in \(\texttt{modifyConstraints}\) afterward...

To add \(\max\) constraints in Gurobi, you will have to introduce auxiliary variables for each \(\max\) term. This means that your expression becomes \[\begin{align*}(0.5 \cdot Z &+ a_1 + a_2 + \do...