How optimization algorithms work & improving their performance

Optimal solution found early but long time to close gap Ongoing
0 votes 5 comments
Bug report: Different settings of MIPFocus result in different number of solutions Answered
0 votes 7 comments
Do node relaxation values violate constraints? Answered
0 votes 5 comments
Gurobi vs. Cplex -- lower bounds Awaiting user input
0 votes 2 comments
The order of variables may affect the feasibility of the model Awaiting user input
0 votes 1 comment
improving the quality of feasible solution Answered
0 votes 2 comments
Adding a few variables and constraints makes the model nearly unsolvable Ongoing
0 votes 4 comments
Lazy constraints as general constraints? Awaiting user input
0 votes 1 comment
Linearize general constraints Gurobi Answered
0 votes 1 comment
Dual values for maximization problem with and without variable upper bound Answered
0 votes 3 comments
insert heuristic into CallBack Answered
0 votes 4 comments
Callback cut count and cut count in the MIP log are not equal Answered
0 votes 3 comments
pre-solve algorithm Answered
0 votes 1 comment
Can we add user cuts on root node only? Answered
0 votes 2 comments
Lazy Constraints with Presolve Answered
0 votes 1 comment
User Cuts cut off too much (done after one cut) - Problem with Presolver Ongoing
0 votes 2 comments
pre-solve is buggy Ongoing
0 votes 5 comments
Branch-and-cut performance and PreCrush Answered
0 votes 2 comments
warm start LP solver in Gurobi Answered
0 votes 2 comments
L1 minimization Answered
0 votes 7 comments
Custom heuristic implementation for MIQCP Answered
0 votes 4 comments
User cuts are not counted in the MIP log Ongoing
0 votes 3 comments
Some questions about what I do to deal with the slow decline of gap value. Answered
0 votes 6 comments
How do I specify the algorithm used to solve my model in pyomo? Answered
1 vote 1 comment
Branch-and-Bound integer/float Answered
0 votes 1 comment
Crossover Takes Long Answered
0 votes 1 comment
Bug with "presolve" Answered
0 votes 1 comment
Stop callbacks Answered
0 votes 1 comment
Unable to find sub-optimal solution Answered
1 vote 3 comments
MIPGap and Runtime query before optimization stops Answered
0 votes 8 comments