Re[2]: [Help-glpk] LPP & MIP

[Richard Prescott]

Unfortunately, I don't understand why integer row singleton cannot be 
eliminated.  It might (in part) explain why the attached file doesn't work 
(yet).  (I began to wrote a longer email then I wanted to verify my 
assumptions then I wrote this piece of code then time goes so fast...)

Regards

Richard

On Sat, 31 Jul 2004, Andrew Makhorin wrote:

> > Is there any good reason why LPP isn't used for lpx_integer() ?
>
> LPP cannot presolve mip's, because it knows nothing about integer
> variables (for example, elimination of a row singleton must not be
> used if corresponding variable is of integer kind, etc.).
>
> There must be IPP, however, no one has written/contributed it yet :+)

miplpp.c
Description: Text document

bpp25.mod
Description: Text document