Forum
Topics that are not productspecific, related to modeling and solving MP problems, including best practices.
This forum has been locked.
Log in to start a topic.Topics  Replies  Likes  Latest Post  
Pinned topic 
WELCOME TO THE IBM ILOG MATHEMATICAL PROGRAMMING FORUM [Locked] 
0 

20091224T22:55:19Z  
Started by
SystemAdmin

By
SystemAdmin


Unanswered question 
CPLEX Mathematical Model 
1 

20160823T23:51:48Z  
Started by
kashifjadoon


Unanswered question 
help 
5 

20160823T15:55:25Z  
Started by
kindbright

By
John Cui


Answered question 
an eeror solution to mip 
3 

20160817T02:15:33Z  
Started by
RainLee

By
RainLee


Unanswered question 
Matlab convert to CPLex 
1 

20160701T06:46:27Z  
Started by
Dranzer1410


Answered question 
How to acess the previous online manual 
2 

20160618T13:20:37Z  
Started by
Kunlei

By
Kunlei


Answered question 
How to transform a big M into an SOS constraint ? 
5 

20160613T19:33:56Z  
Started by
Zoubeir

By
PaulRubin


How to avoid duplicate columns in column generation problems 
2 

20160610T09:20:57Z  
Started by
RajaniK

By
nhanquy


Answered question 
How to use indicator constraints in Python? 
1 

20160607T15:12:29Z  
Started by
Zoubeir

By
Zoubeir


Sample Code for a valid inequality generated for mathematical programming 
4 

20160606T13:57:01Z  
Started by
prasenjit mandal

By
Jacko


Answered question 
Feasibility Test 
2 

20160527T21:54:30Z  
Started by
Phoebe_Qi

By
Phoebe_Qi


Unanswered question 
How to define a set 
2 

20160508T20:27:40Z  
Started by
Crubal

By
Crubal


Unanswered question 
How to use mipStart in matlab? 
1 

20160425T05:36:38Z  
Started by
huda_z


Answered question 
Unable to install CPLEX on MAC 
4 

20160419T18:04:44Z  
Started by
stella1980

By
stella1980


Answered question 
Problem in invoking the conflict in matlab 
2 

20160407T05:37:42Z  
Started by
huda_z

By
huda_z


Answered question 
Ilocplex getvalue returns only first value 
2 

20160330T20:46:38Z  
Started by
Mahesh Bakshi


Unanswered question 
How to build a model Jobshop 
1 

20160324T19:42:14Z  
Started by
TrầnQuốcĐạt


Answered question 
Cplex printing MIP warnings to console even though Ouput stream is null 
2 

20160323T13:24:35Z  
Started by
SVJS_Leonardo_Lamorgese


Unanswered question 
the easy problem for CPLEX new learner 
4 

20160321T06:29:54Z  
Started by
zj2016


Answered question 
Calculate completion time of jobs 
7 

20160212T16:24:12Z  
Started by
Mintch Zulitch

By
PaulRubin


Answered question 
Group selection problem 
6 

20160209T19:49:18Z  
Started by
Mintch Zulitch


Now all users can easily record wishes for CPLEX Optimization Studio 
1 

20160201T14:45:19Z  
Started by
AlexFleischer


Unanswered question 
How to model a simple constraint with if condition 
1 

20160109T22:40:30Z  
Started by
Zoubeir

By
PaulRubin


Unanswered question 
Error in defining the conditional array 
2 

20151231T10:25:57Z  
Started by
memop

By
memop


Answered question 
Nodefile size 
5 

20151207T06:50:32Z  
Started by
MamadConcordia


Unanswered question 
why when I give a tight upper bound says no solution exists 
1 

20151201T07:41:05Z  
Started by
yokito


Unanswered question 
How to solve a nonlinear problem with posynomial constraints and mixed binary and integers variables… 
1 

20151127T05:31:52Z  
Started by
Zoubeir


Unanswered question 
Distributed MIP optimization on a single machine with multiple cores 
11 

20151127T05:20:52Z  
Started by
Mr.Hai


Answered question 
How to write this constraint ? 
1 

20151125T23:10:32Z  
Started by
Zoubeir

By
Zoubeir


Unanswered question 
How to write the constraint with if else consition involving binary and integer variables. 
3 

20151117T17:20:16Z  
Started by
Zoubeir


Unanswered question 
concert\include\ilconcert : warning C4512 
1 

20151110T06:30:11Z  
Started by
Eglantine


Answered question 
IProblem with installing IBM ILOG 12.6.1 on Ubunt 14 
1 

20151109T15:57:37Z  
Started by
Mr.Hai

By
Mr.Hai


Unanswered question 
Using multidimensional arrays and a onedimensional "tuple"array in one constraint 
2 

20151105T19:47:01Z  
Started by
CaWa


Answered question 
"or" constraints/discontinuous constraints 
2 

20150925T06:58:49Z  
Started by
djami

By
djami


Adding New Variables and New Constraints in Linear Programming 
1 

20150824T06:43:40Z  
Started by
Ho_Thanh

By
RWunderling


Symmetry Detection 
3 

20150817T05:48:53Z  
Started by
Eglantine


Unanswered question 
A minimisation problem with max{0,..} in objective to maximisation problem 
2 

20150808T09:47:47Z  
Started by
Marjoo

By
Marjoo


Unanswered question 
Cplex in Xcode  Mac 
2 

20150704T10:09:31Z  
Started by
M.Mubarak

By
M.Mubarak


Unanswered question 
Cplex vs Gurobi 
3 

20150704T04:05:19Z  
Started by
bioinfor

By
EdKlotz


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


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


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
