How optimization algorithms work & improving their performance

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