Algorithms – Gurobi Support Portal

How optimization algorithms work & improving their performance

Strange crossover behavior

Michael Khachay
December 02, 2021 20:36

0 votes 0 comments

The order of variables may affect the feasibility of the model Awaiting user input

Xinyi Hu
November 27, 2021 16:42

0 votes 1 comment

improving the quality of feasible solution Answered

yansong bai
November 26, 2021 04:11

0 votes 2 comments

Gurobi vs. Cplex -- lower bounds Awaiting user input

Victor Miller
November 24, 2021 16:23

0 votes 2 comments

Lazy constraints as general constraints? Awaiting user input

Alberto Torrejón Valenzuela
November 09, 2021 22:53

0 votes 1 comment

Linearize general constraints Gurobi Answered

Fariha Kabir Torsha
November 09, 2021 20:05

0 votes 1 comment

Adding a few variables and constraints makes the model nearly unsolvable Ongoing

Fikri Kucuksayacigil
October 25, 2021 16:57

0 votes 4 comments

Dual values for maximization problem with and without variable upper bound Answered

Grzegorz Siekaniec
October 24, 2021 13:48

0 votes 3 comments

Optimal solution found early but long time to close gap Ongoing

Marta Vanin
October 22, 2021 15:40

0 votes 5 comments

insert heuristic into CallBack Answered

Murilo Machado
October 19, 2021 20:46

0 votes 4 comments

pre-solve algorithm Answered

Zohar Levi
October 12, 2021 23:16

0 votes 1 comment

User Cuts cut off too much (done after one cut) - Problem with Presolver Ongoing

Sebastian Kreuz
October 11, 2021 06:42

0 votes 2 comments

Callback cut count and cut count in the MIP log are not equal Answered

Jihye Jung
October 11, 2021 11:54
Edited

0 votes 3 comments

Can we add user cuts on root node only? Answered

Cheng-Lung Chen
October 09, 2021 20:16

0 votes 2 comments

Lazy Constraints with Presolve Answered

Veronika Eisgruber
October 08, 2021 10:42

0 votes 1 comment

Branch-and-cut performance and PreCrush Answered

Cheng-Lung Chen
October 04, 2021 16:42

0 votes 2 comments

warm start LP solver in Gurobi Answered

yunzhuang shen
October 04, 2021 05:46

0 votes 2 comments

L1 minimization Answered

L1fe
September 30, 2021 17:20
Edited

0 votes 7 comments

Custom heuristic implementation for MIQCP Answered

Shuvomoy Das Gupta
September 30, 2021 15:56

0 votes 4 comments

User cuts are not counted in the MIP log Ongoing

Jihye Jung
September 30, 2021 04:36

0 votes 3 comments

pre-solve is buggy Ongoing

Zohar Levi
September 16, 2021 09:36

0 votes 5 comments

How do I specify the algorithm used to solve my model in pyomo? Answered

Amanda Farnsworth
September 08, 2021 17:19

1 vote 1 comment

Branch-and-Bound integer/float Answered

Tessa Meyer
September 06, 2021 15:49

0 votes 1 comment

Crossover Takes Long Answered

Wenbo Ma
September 06, 2021 02:50
Edited

0 votes 1 comment

Stop callbacks Answered

Juan Calle
September 03, 2021 05:56

0 votes 1 comment

Bug with "presolve" Answered

Haochen Sun
September 02, 2021 11:39
Edited

0 votes 1 comment

Unable to find sub-optimal solution Answered

Mohit Kumar
August 31, 2021 07:11

1 vote 3 comments

Some questions about what I do to deal with the slow decline of gap value. Answered

Yanbo Fan
August 29, 2021 16:12

0 votes 6 comments

Bug report: Different settings of MIPFocus result in different number of solutions Answered

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