Re: [Help-glpk] Problem in GLPK

[Aly Megahed]

Hi Xyron,

Thanks for your reply.

What do you mean by "exploiting the natural sparsity of my problem"? I mean, 
how is that done exactly in my example for instance?

Aly

----- Original Message -----
From: "glpk xypron" <address@hidden>
To: "Aly Megahed" <address@hidden>, address@hidden
Sent: Thursday, April 29, 2010 2:16:37 AM GMT -05:00 US/Canada Eastern
Subject: Re: [Help-glpk] Problem in GLPK

Hello Aly,

>   glp_malloc: no memory available
>   Error detected in file    \src\glpenv05.c at line 70
> 
> The constraint that caused that error is:
> 
>  s.t. Delivery_from_Same_Project{j in J, k in K, p in P, t in T: j!=k}:
> xx[j,k,p,t] ==0; 
>

columns that are always zero should not be defined.

Instead you should exploit the natural sparsity of your
problem to reduce the memory usage.

Best regards

Xypron

-- 
GRATIS fur alle GMX-Mitglieder: Die maxdome Movie-FLAT!
Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

-- 
PhD Student
Vice President, Egyptian Student Association in North America, Georgia Tech 
Chapter

Rm. 407 Main Building
H. Milton Stewart School of Industrial and Systems Engineering
Georgia Institute of Technology
765 Ferst Dr., NW
Atlanta, Georgia 30332-0205, USA