[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Help-glpk] glpsol (MIP) "-w" output specification, "-y" operatio

From: Michael Hennebry
Subject: Re: [Help-glpk] glpsol (MIP) "-w" output specification, "-y" operation
Date: Fri, 8 May 2009 09:58:01 -0500 (CDT)
User-agent: Alpine 1.00 (DEB 882 2007-12-20)

On Fri, 8 May 2009, Johannes Waldmann wrote:

Z = SUM Bz[j, k]*max(j, k)

yes, that's basically a unary encoding of numbers as bit strings.
If I'm taking that route, I can go all the way and use *only* booleans.
Then it's a SAT problem, and there are very good solvers for these,

I wasn't really suggesting unary, just noting the possibility.
I'm intermittently working on the SAT solver that I
didn't get done in time for this year's competition.

I'll give MIP one more try, though,
reducing the "big M" as far as possible.

Absent more information, the big M sizes I gave are as small as they will go.

Michael   address@hidden
"Pessimist: The glass is half empty.
Optimist:   The glass is half full.
Engineer:   The glass is twice as big as it needs to be."

reply via email to

[Prev in Thread] Current Thread [Next in Thread]