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Topics that are not productspecific, related to modeling and solving MP problems, including best practices.
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WELCOME TO THE IBM ILOG MATHEMATICAL PROGRAMMING FORUM [Locked] 
0 

20091224T22:55:19Z  
Started by
SystemAdmin

By
SystemAdmin


Unanswered question 
Cplex in Xcode  Mac 
0 

20150630T21:56:02Z  
Started by
M.Mubarak

By
M.Mubarak


Unanswered question 
How to model precedence relationship in multi step scheduling 
1 

20150626T04:51:15Z  
Started by
YYHH


Unanswered question 
solving MIP: How to get a quick starting feasible solution ? 
1 

20150625T06:35:27Z  
Started by
Zak86


Answered question 
Error: IloNumVar has not been extracted by IloAlgorithm 
1 

20150624T13:55:05Z  
Started by
Jaaron

By
Jaaron


Unanswered question 
Cplex vs Gurobi 
2 

20150623T09:01:24Z  
Started by
bioinfor

By
bioinfor


Answered question 
How to stop optimization when the best integer solution founded above zero 
3 

20150613T19:03:47Z  
Started by
RainLee

By
EdKlotz


Unanswered question 
Subtour Elimination 
1 

20150518T05:19:05Z  
Started by
jarchit52


Answered question 
Quadratic Interger Programming + Quadratic Contraints? 
12 

20150507T08:45:56Z  
Started by
nepomuk.hirsch


Unanswered question 
IlovarArray Definition 
1 

20150505T05:59:45Z  
Started by
AMurshed


Answered question 
Difficult sum in flowshop scheduling 
4 

20150430T07:01:17Z  
Started by
Rivers

By
Rivers


Unanswered question 
How can I get CPLEX Optimization Studio 12.4 
1 

20150420T07:06:02Z  
Started by
FFJ2_军_吴


How to avoid duplicate columns in column generation problems 
1 

20150417T23:59:48Z  
Started by
RajaniK

By
PaulRubin


Unanswered question 
Consideration of Dual values 
2 

20150417T17:21:24Z  
Started by
RajaniK

By
RajaniK


Answered question 
Xcode c++ and Cplex 
22 

20150417T07:32:20Z  
Started by
SystemAdmin


Modifying IloNumVarArray and IloNumArray 
9 

20150417T07:27:48Z  
Started by
AMurshed


Answered question 
CPLEX(default) cannot extract expression  why not? 
4 

20150413T07:23:01Z  
Started by
Ranton


Answered question 
Gap in the engine log for optimal solution 
2 

20150327T17:19:37Z  
Started by
Thaher

By
Thaher


Piecewise cannot extract expression 
6 

20150327T04:43:19Z  
Started by
Chipper

By
Chipper


Answered question 
Using model output as input for next model (Incremental Build)) 
7 

20150324T10:43:53Z  
Started by
AMurshed

By
AMurshed


Answered question 
C++/Cplex 
6 

20150323T15:03:18Z  
Started by
Thaher


Answered question 
CPLEX inside CLASS 
3 

20150323T09:08:46Z  
Started by
AMurshed

By
AMurshed


slow column generation 
1 

20150320T06:43:00Z  
Started by
pradeepram80


Answered question 
Solving Incremental model 
4 

20150319T11:51:24Z  
Started by
AMurshed

By
AMurshed


Effects of valid inequalities on root node LB 
1 

20150312T07:14:46Z  
Started by
pareto


Unanswered question 
CPLEX/JAVA:Problem in setting FP(feasibility pump)heuristic param, solving binary LP 
3 

20150304T11:24:52Z  
Started by
Zak86

By
hllsen


Unanswered question 
Scal prod with both IntVar and NumVar 
5 

20150211T12:33:29Z  
Started by
davidoff


Unanswered question 
Start a BranchandBound with Callable 
2 

20150130T10:47:41Z  
Started by
Allexandre

By
Allexandre


link inventory control problem with TSP 
13 

20150128T14:35:21Z  
Started by
max__x

By
max__x


inventory routing problem 
0 

20150127T01:27:25Z  
Started by
max__x

By
max__x


Inventory routing problem 
0 

20150126T23:10:29Z  
Started by
max__x

By
max__x


inventory routing problem 
0 

20150126T23:01:29Z  
Started by
max__x

By
max__x


Dual Values for Primal Variable Bounds 
2 

20150122T09:24:57Z  
Started by
JorisK

By
JorisK


Unanswered question 
Accessing rows values after optmization 
3 

20150120T12:31:04Z  
Started by
Allexandre


Lexicographic permutations 
1 

20150115T08:18:42Z  
Started by
nzinour


TSP  subtour elimination constraints 
4 

20150114T14:24:26Z  
Started by
Stefano_TUE


Unanswered question 
Callable  Integer Variables 
3 

20150112T12:39:05Z  
Started by
Allexandre


Cannot extract expression 
10 

20150109T16:41:15Z  
Started by
Flotila

By
Flotila


Unanswered question 
internal error (Please notify IBM) 
2 

20150107T20:25:06Z  
Started by
emillarsen


Unanswered question 
beginner in learning and need help 
1 

20150107T14:24:36Z  
Started by
Mehrsa


Answered question 
Gomory (Fractional) Cuts via Callable / Callback 
6 

20150106T10:48:54Z  
Started by
Allexandre


Unanswered question 
Supply Chain model  OPL or concert technology? 
2 

20150105T18:10:00Z  
Started by
Ujfaaz

By
Nicolas33


Answered question 
Predecessor/Successor Nodes 
1 

20141230T18:52:54Z  
Started by
Thaher

By
Thaher


I do not know how to create the restriction 
0 

20141230T12:26:23Z  
Started by
JuanCarlosPego


Unanswered question 
Constraint format in problem browser 
1 

20141223T18:03:38Z  
Started by
Thaher


Answered question 
Inventory level (time periods) 
4 

20141221T08:10:14Z  
Started by
Thaher

By
Thaher


Problem in code 
8 

20141214T15:43:22Z  
Started by
giannil


Solution Tagret 
1 

20141205T09:06:59Z  
Started by
S6R9_Dua_Weraikat


scalability of parallelizing barrier method 
0 

20141201T22:43:22Z  
Started by
Uonly

By
Uonly


The problem in the last tour of Lazy Constraint 
1 

20141129T18:40:27Z  
Started by
Kubra

By
PaulRubin


Unanswered question 
How to add my own Gomory CUts 
1 

20141124T01:44:23Z  
Started by
Allexandre

By
Allexandre


Integer Programming scheduling problem 
4 

20141111T07:58:46Z  
Started by
giannil


Unanswered question 
Help! cplex takes a long time to solve with large memory usage 
5 

20141028T11:00:18Z  
Started by
TonyWangyanchun


Unanswered question 
How to reformulate my model? it takes so long a time to solve 
1 

20141028T07:03:59Z  
Started by
TonyWangyanchun


Unanswered question 
Solving a huge number of transportation problems faster 
1 

20141007T09:05:15Z  
Started by
Amit_IIMA


pivoting rule of primal simplex method 
3 

20141003T06:29:53Z  
Started by
Uonly

By
RWunderling


Cannot open include file 'ilcplex/cplex.h' in Visual C++ 2010 
1 

20140925T04:32:40Z  
Started by
prasenjit mandal


Unanswered question 
modelling an equation 
2 

20140916T14:25:38Z  
Started by
ShirinG

By
ShirinG


Does adding constraints which cut nonoptimal feasible solutions worth the effort? 
1 

20140909T19:47:49Z  
Started by
Amit_IIMA

By
PaulRubin


warm start LP using a feasible dual 
3 

20140909T15:04:13Z  
Started by
Uonly

By
PaulRubin


Unanswered question 
Freeing Arrays? 
2 

20140904T16:46:34Z  
Started by
jlbark

By
jlbark


Answered question 
Does condensed expressions in the model saves time? 
2 

20140902T08:38:42Z  
Started by
Amit_IIMA

By
Amit_IIMA


Unanswered question 
how to define a range in cplex ?? 
0 

20140823T15:09:25Z  
Started by
Achrafchen

By
Achrafchen


Answered question 
Degenerate Simplex Tableaux 
2 

20140818T18:22:26Z  
Started by
jlbark

By
jlbark


Interepreting CPLEX Output 
4 

20140814T05:15:35Z  
Started by
kpnane


Answered question 
How to generate lp file from Matlab 
1 

20140813T13:43:44Z  
Started by
Mr.Hai

By
Mr.Hai


Cplex gets stuck 
4 

20140805T06:33:08Z  
Started by
XavierMora


Writing Disjunctive constraints in OPL CPLEX 
2 

20140710T02:19:55Z  
Started by
Shawn1

By
Shawn1


Unanswered question 
Writing Disjunctive constraints in VBA? 
0 

20140709T20:36:18Z  
Started by
Shawn1

By
Shawn1


Scripting parser error? 
2 

20140618T05:26:37Z  
Started by
TracyLLL

By
TracyLLL


Does OPL in V12.6 support nonconvex MIQP problem? 
3 

20140611T16:40:41Z  
Started by
TracyLLL

By
davidoff


Comparing two mathematical models 
8 

20140523T17:44:06Z  
Started by
Eduardo85

By
Eduardo85


Output objective value and elapsed time of an incumbent solution 
2 

20140522T09:49:09Z  
Started by
Biyu

By
Biyu


Answered question 
how to read .lp file in cplex optimization studio 
3 

20140512T05:36:56Z  
Started by
Sanias


Unanswered question 
rand() doesn't give random numbers 
2 

20140511T08:17:04Z  
Started by
emillarsen


Need school bus routing problem examples 
2 

20140509T04:04:36Z  
Started by
Sanias

By
Sanias


Unanswered question 
Need examples for planning a league with 18 teams with minimizing the breaks 
1 

20140507T09:47:44Z  
Started by
Muidna


Unanswered question 
Using for and while loops for input data 
4 

20140507T06:56:50Z  
Started by
emillarsen


Answered question 
setOut question 
2 

20140503T21:13:53Z  
Started by
Lessi

By
Lessi


code problem 
1 

20140503T20:22:58Z  
Started by
ga67liv

By
PaulRubin


Answered question 
Dynamic Search Algorithm 
1 

20140430T20:52:13Z  
Started by
Vincent_Arm


Unanswered question 
CPLEX cannot extract expression 
2 

20140429T08:32:43Z  
Started by
applekk


Capacitated VRP 
1 

20140425T09:43:12Z  
Started by
RithulKrishnan


Answered question 
Computation Time 
4 

20140425T04:02:30Z  
Started by
RithulKrishnan


Operator not available for dvar float * {boolean}. 
6 

20140423T15:52:22Z  
Started by
Amani_Jerbi

By
Amani_Jerbi


Answered question 
Traveling Salesman Problem 
7 

20140420T07:48:37Z  
Started by
RithulKrishnan


Cplex versus Oplide 
4 

20140410T07:40:26Z  
Started by
SébastienM

By
SébastienM


Generating cover Inequality for a 01 Knapsack problem and adding it to the problem using concert… 
4 

20140402T12:29:13Z  
Started by
prasenjit mandal


roadmap 
4 

20140320T07:11:47Z  
Started by
ouaigooo

By
ouaigooo


Unanswered question 
smallpox model 
0 

20140215T17:52:17Z  
Started by
2T3M_lolol

By
2T3M_lolol


How to describe my model with OPL 
2 

20140210T09:19:39Z  
Started by
zhd87

By
zhd87


Unanswered question 
CPLEX Error 5002: Q is not positive semidefinite 
1 

20140131T11:11:41Z  
Started by
Morianta


MP application testing 
3 

20140116T20:55:16Z  
Started by
mbaddar1

By
PaulRubin


discontinuous piecewise linear function modeling 
6 

20131220T22:02:00Z  
Started by
QiuFeng

By
QiuFeng


Now all users can easily record wishes for CPLEX Optimization Studio 
0 

20131211T08:13:29Z  
Started by
AlexFleischer


Getting unbounded direction in C++ API 
12 

20131202T06:32:29Z  
Started by
Industrial88


Unanswered question 
How to express it using OPL 
2 

20131126T13:36:46Z  
Started by
Sonny


Answered question 
How to express it using CPLEX? 
2 

20131120T08:11:25Z  
Started by
heidizh

By
heidizh


A constraint definition isue in concert technology/c++ interface 
2 

20131118T21:03:34Z  
Started by
Industrial88

By
Industrial88


4 open PhD positions at IBM France Lab 
1 

20131114T05:21:34Z  
Started by
AlexFleischer

By
Lessi
