Hi Michael,
Thank you very much for your response. Yes, my problem is a capacitated
transhipment problem. I do not understand what you mean by "look for more
constraints or a better formulation". Can you give me an example where putting
more contraints can reduce the number of variables?
Thanks in advance.
Rdgs,
Paul
----- Original Message ----
From: Michael Hennebry <[EMAIL PROTECTED]>
To: RC Loh <[EMAIL PROTECTED]>
Cc: [email protected]
Sent: Thursday, 26 June 2008 9:20:52
Subject: Re: [Help-glpk] Using lpx_integer for more than 200 variables
On Thu, 26 Jun 2008, RC Loh wrote:
> According to page 62 of the "GUN Linear Programming Kit Reference Manual
> Version 4.19", it stated that "Most probably this solver can be used for
> solving MIP problems with one or two hundreds of integer variables." Did
> anyone attempt to execute lpx_integer with more than 200 hundreds of integer
> variables?
My problem deals with about 10,000 integer variables. Any recommendation of
what modification needs to be done in the lpx_integer routine to cater for
10,000 integer variables?
If your problem is a capacitated transhipment problem,
you're in like Flynn.
If it's not and GLPK can't solve it,
look for more constraints or a better formulation.
--
Michael [EMAIL PROTECTED]
"Those parts of the system that you can hit with a hammer (not advised)
are called Hardware; those program instructions that you can only
curse at are called Software."
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