Lorenz Wagner

Hello, I have the following question. I am currently solving a Cullum generation problem and have observed the following. When I solve the subproblems, I sometimes find several optimal solutions (i...

Hi Gurobi Team,I'm implementing a column generation algorithm where, in each iteration, I solve one independent subproblem per patient (or entity) to generate new columns. Since these subproblems o...

Hello, I have the following question. I want to implement the following non-linear constraint in Gurobi. This is the constraint in question. I have linearized like this and then implemented it with...

Hello, I have the following question. I use addGenConstrExp and addGenConstrLogistic to linearly approximate an exponential and a logarithmic function. Is it possible that I can somehow output the ...

I have the following scheduling problem. Relatively simple and not very complex (only serves as an example). The indexes are \(I\) worker, \(T\) days and \(J\) shift. The decision variable is \(x_{...

Hello, I have a purely technical question about Gurobi. Suppose I have the variable \(y_{ijk} \in [0;1]\) . Now I want to define a binary variable \(x_{ijk}\)  that takes the value 1 if \(y_{ijk}=1...

Hello, I have the following problem. I am trying to evaluate the lowe bound and the incumbent via the log of my model and use the glt.get_dataframe() command to create a DataFrame. Unfortunately I ...