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Operations Research

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Awarded 886 times.
"User did not provide appropriate variable bounds" error in BARON via AMPL
Awarded Dec 5 at 17:09
If the Lagrangian dual function is always concave, why aren't we "just" solving dual problems optimally?
Awarded Nov 27 at 1:10
Optimization problems with softmax [reference request]
Awarded Nov 21 at 22:11
HiGHS not available in pyomo
Awarded Nov 21 at 19:52
Add lazy constraints not linked to current solution candidate in CPLEX callback
Awarded Nov 17 at 11:10
Forcing sum of variables to zero after a binary event
Awarded Nov 13 at 19:56
Implied bound cuts : to aggregate or not to aggregate?
Awarded Nov 11 at 7:32
Linearizing a Fractional Program
Awarded Oct 31 at 18:48
integer programming relaxation problem
Awarded Oct 31 at 1:15
Finding a solution with few near-zeros
Awarded Oct 28 at 16:36
Bin packing but each ball can only go into a subset of the bins. Does this problem have a name?
Awarded Oct 28 at 0:36
Proof of uniqueness of convex sets using their support functions
Awarded Oct 17 at 19:46
How do handle maximum in a quadratic programming problem by adding auxiliary variables?
Awarded Oct 8 at 9:16
Combining Multiple Cost Values in Shortest Path Problem
Awarded Oct 5 at 21:22
Formulating a LP model with 3 variables but there's a variable in the right-hand side of the inequality
Awarded Oct 4 at 12:30
Improving MILP formulation (profitability based network design)
Awarded Sep 30 at 13:27
How to compile my own Couenne solver using Windows
Awarded Sep 29 at 8:48
If $x_1 \geq 4$ then **one** out of the following three constraints must hold: $x_2 \leq 3, x_3 \leq 4, x_4=5$
Awarded Sep 17 at 10:58
How to Implement a Piecewise Function Using SOS2 in GAMS Without Binary Variables in an MILP Model?
Awarded Sep 15 at 12:41
Casting the truth value of an inequality to a boolean
Awarded Sep 6 at 16:05
Are there ways to assist Gurobi in finding good solutions?
Awarded Sep 5 at 19:14
pyinstaller and Pyomo and also SCIP
Awarded Sep 4 at 15:16
In OR literature, what are the general capitalization rules
Awarded Sep 3 at 11:31
Gurobi in python not able to solve nonlinear question
Awarded Aug 29 at 15:22
Infeasibility of subproblem in Combinatorial Benders Decomposition
Awarded Aug 28 at 12:27
CPLEX Working Memory
Awarded Aug 26 at 18:35
Household groceries problem
Awarded Aug 20 at 17:46
Circle packing with discrete points
Awarded Aug 8 at 15:56
Queueing system with 2 heterogeneous servers with prioritizing customers
Awarded Aug 7 at 10:53
Why is the convex hull of a integer linear program a polyhedron with same optimum?
Awarded Jul 24 at 7:42
About the mathematical proof of shadow price
Awarded Jul 23 at 3:33
Conditional Constraint Formulation LP
Awarded Jul 15 at 12:24
How can I create a python program that organizes CSV into combinations?
Awarded Jul 3 at 3:08
How to avoid division by zero with a binary variable at the denominator in a network assignment problem?
Awarded Jul 2 at 20:36
Penalize absolute value while keeping the problem DPP (CVXPY)
Awarded Jun 26 at 22:50
Cumulative constraint with a window
Awarded Jun 25 at 6:40
Optimal way to formulate a piecewise linear function
Awarded Jun 24 at 19:20
Multi-Commodity Flow with "group edges"
Awarded Jun 23 at 15:57
How to write conditional constraints and sum the result in Linear Programming in Python?
Awarded Jun 19 at 6:45
Avoid double counting in objective function for a maintenance scheduling problem
Awarded Jun 18 at 13:27
Modeling $-\ln(1 - w \cdot \sigma(x))$ as disciplined convex programming
Awarded Jun 17 at 13:25
Is 0-1 knapsack problem still NP-Hard (1) with an equality constraint and (2) when all the weights in the constraint are equal to one?
Awarded Jun 17 at 7:25
Traverse discrete approximations to a continuous system
Awarded Jun 3 at 20:08
How is this function piece-wise linear?
Awarded Jun 3 at 2:28
How does pyomo handle constraints with equal index
Awarded May 30 at 13:45
Set a limit on value change of a binary variable
Awarded May 27 at 6:57
Inconsistent solutions to linear optimal control problem
Awarded May 24 at 0:46
Unable to find good solution for CVRP with Time Window
Awarded May 18 at 4:15
Branch & bound: why does the lower bound increase?
Awarded May 17 at 10:10
optimizing choosing subset of best items
Awarded May 13 at 11:03
How to deal with mixed linear integral optimization problem with extra nonconvex but differentiable constraints?
Awarded May 9 at 13:15
Single Machine Job Scheduling With Release Dates and No Idling Constraint
Awarded May 3 at 14:47
Multiprocessor Scheduling Problem: How to modify some constraints after variable changing?
Awarded Apr 30 at 22:07
Formulation and modeling of a logistics problem: Combination of bin packing and cutting stock problem?
Awarded Apr 29 at 13:51
Problem with setting up gurobi with OR-tools
Awarded Apr 25 at 21:30
Reformulate constraints
Awarded Apr 21 at 10:27
Generating a good initial solution for a problem
Awarded Apr 17 at 13:27
Interpret the formulation of a pricing model in crowdshipping
Awarded Apr 9 at 7:15
Optimal Methods and LBFGS
Awarded Apr 7 at 16:16
linearizing a constraint involving an absolute function
Awarded Apr 3 at 13:42
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