Re: [Help-glpk] Problem retrieving specific result from solution

2009-12-02 Thread Andrew Makhorin
> I need to retrieve specific result from solution of a computation of > glpk Api. > I used c# wrapper that i've found in a first time. > I create a model file and a data file.I call the right function to > solve the problem on my C# application. > I don't know how to retrive only the result of t

Re: [Help-glpk] Linear Programming Relaxation

2009-12-02 Thread Andrew Makhorin
> Some of the terms used by Michael confused me. Sorry that I am very > new to this area. So I am not familiar with most of the terms. > What is convex and non-convex? > What is global optimum and local optimum? > Can you give me examples of global optimum, local optimum, convex and > non-convex?

RE: [Help-glpk] Linear Programming Relaxation

2009-12-02 Thread Meketon, Marc
To the best of my knowledge (which admittedly is not up-to-date), none of the research into using interior point algorithms for solving integer programs has ever been used commercially, nor has there been any convincing arguments to use interior point algorithms for integer programming. On the

Re: [Help-glpk] Linear Programming Relaxation

2009-12-02 Thread Jeffrey Kantor
Comments embedded below --- On Wed, Dec 2, 2009 at 11:00 AM, RC Loh wrote: > Hi Andrew, Michael, Jeffrey, Ali, > > Thank you very much for all your information and advice. > > So from what I gathered from all of you are that: > > 1) An Integer program can be solved using Interior Point method to

Re: [Help-glpk] Linear Programming Relaxation

2009-12-02 Thread Michael Hennebry
On Thu, 3 Dec 2009, RC Loh wrote: Hi Andrew, Michael, Jeffrey, Ali, Thank you very much for all your information and advice. So from what I gathered from all of you are that: 1) An Integer program can be solved using Interior Point method too. Not necessary solving an Integer program using

[Help-glpk] Problem retrieving specific result from solution

2009-12-02 Thread Alessandro Urbano
Hi, I need to retrieve specific result from solution of a computation of glpk Api. I used c# wrapper that i've found in a first time. I create a model file and a data file.I call the right function to solve the problem on my C# application. I don't know how to retrive only the result of the pr

Re: [Help-glpk] Linear Programming Relaxation

2009-12-02 Thread RC Loh
Hi Andrew, Michael, Jeffrey, Ali, Thank you very much for all your information and advice. So from what I gathered from all of you are that: 1) An Integer program can be solved using Interior Point method too. Not necessary solving an Integer program using Simplex method. 2) Simplex method un

Re: [Help-glpk] Error detected in file glplib10.c at line 109

2009-12-02 Thread Andrew Makhorin
> Hello, I created a test case where I apply a loop over a SINGLE > working thread that solves the LP example and I still have the issue. Please see an example of re-enterable implementation of TLS module for 32-bit Windows DLL (glplib02.c) and a test program (mtsamp.c) that works. Both files are

Re: [Help-glpk] Error detected in file glplib10.c at line 109

2009-12-02 Thread Antonello Lobianco
Hello, I created a test case where I apply a loop over a SINGLE working thread that solves the LP example and I still have the issue. Now I don't know if the problem is (in inverted order of estimated likelihood): 1) in my code; 2) in the Qt thread library; 3) in glpk; 4) somewhere in the compiler