Runtime of LP vs MILP - Operations Research Stack Exchange
2 I was wondering how the run time of an LP and an MILP model compare to each other. I found out that MIPs are NP-hard, where as LPs aren't, but it don't really understand what it means. …
mixed integer programming - Complexity of LP and MILP …
Nov 11, 2019 · My original problem is an MILP. I make it an LP by relaxing the integer variables. Can someone please comment on the complexity, solvability and optimality of MILP and LP …
mixed integer programming - Guides for strong MILP …
Is the scientific community able to provide a guide for addressing the strength of a MILP formulation? Something like "disciplined convex programming" but for strong MILPs, lets call it …
What is the best open-source solver for large-scale MILP …
Jul 7, 2024 · Currentlly, I am using ortools with SCIP/CBC solvers for a large scale optimization problem, which turned out to be quite slow. The integer part of my problem is due to a piece …
mixed integer programming - How does a warm start work in …
Simplex warmstarting is crucial to the performance of MILP solvers since the MILP solver does various modifications to a base problem to solve subproblems. Using warmstart speeds up …
MILP: is it NP-complete or NP-hard?
Nov 12, 2019 · The pieces of information I get online are sometimes confusing. Someone says MILP problems are NP-hard, and somewhere else I found the claim that MILP problems are …
CPLEX gives different solutions of MILP every run
Jan 12, 2022 · 5 I am solving a mixed-integer (binary) linear problem using CPLEX as a solver (branch-and-bound method). But I encountered the following issue. Each run I get a different …
How can I transform this MILP into an LP problem?
Dec 17, 2019 · 10 I have a MILP problem with one of the constraints is given below. Sometimes, even for a small-sized problem, the solver takes a very long time to find a solution. What could …
How can I identify the reason that makes a MILP model hard for …
Sep 25, 2020 · For a MIP, out of memory exceptions typically happen when the tree size becomes very large. If your LP relaxation is weak, then intuitively your model may become …
How to measure the tightness of MILP models?
Apr 5, 2022 · Suppose we have a MILP model. How can we say this model is tight or not? How to make it more tight? Any advice or example?