Sagnik Basumallik

Hi, I have a dense matrix H which I have transformed into a sparse matrix. from scipy import sparsesH = sparse.csr_matrix(H) I have a D matrix which is an identity matrix with Gurobi variables in t...

Hi All I have a problem that minimizes the following: minimize trace(A^TBA) where the matrices A and B have the following dimension A = (3038 x 2000) B = (3038 x 3038) I write the objective functio...

I am trying to understand if Gurobi derives lower bounds on the optimal solution value of a MILP problem using dual functions when Branch-and-Cut is used.  If yes, is there a way to access the dual...

I am trying to relax integer variables such that the resulting problem is linear. To do this, I am using a iterative weighted approach. The intermediate solutions I obtain (say after 6 iterations) ...

I have a Mixed Integer (Binary) Linear Program with the following variables. x = m.addVars(nodes, area,vtype=GRB.BINARY, name="x") w = m.addVars(arcs,area, vtype=GRB.BINARY, name="w") z = m.addVars...

Currently, I am solving a MOOP in Gurobi. The first way is the linearly blended method. m.setObjective(obj1+obj2+obj3) Next, I have re-write n-1 objectives using the ε-constraint method, m.addConst...

Hi, I have written a multi-objective optimization using Hierarchical formulation. m.setObjectiveN(obj1, index = 1, priority = 2, abstol=20.0)m.setObjectiveN(obj2, index = 2, priority = 1, abstol=0....

I get the following error for a constraint. Note this was working in Gurobi 8 but not in Gurobi 9. m.addConstrs(0 <= f1[i,j,h] <= 200*z[i,j] for i,j in arcs for h in area)  The full error is as fol...

I have two questions. 1. Does Gurobi support semi definite programming? 2. Is there direct support to include trace of matrix in the objective function?

I have defined a binary variable: z = m.addVars(arcs, vtype=GRB.BINARY,name="z") where arcs are (i,j). z_{i,j} = 1 means there exists a line between i and j.I want to create a matrix such that z_{i...