[Coin-discuss] CoinMpsIO -- LI Bounds problem?

[Matthew Saltzman]

On Sat, 6 May 2006, Robert Fourer wrote:

>
> There's a lengthy discussion of MPS form, including a list of numerous bound
> types, at http://lpsolve.sourceforge.net/5.1/mps-format.htm.  I'm not sure
> that there's any really official description of this format, however.
> System developers have felt free to modify it over the years.

LI in particular is a CPLEX extension AFAIK.  The CPLEX dialect is fairly 
well documented in the CPLEX online manuals.

LI indicates that the indicated variable is integer and that the indicated 
(integer) value is its lower bound.

Integers with no upper bound can be indicated by specifying LI with value 
0 and omitting the UI record.  It seems reasonable to presume that 
omitting LI results in a lower bound of 0 by default.

>
> Bob Fourer
> 4er at iems.northwestern.edu
>
>
>> -----Original Message-----
>> From: coin-discuss-bounces at list.coin-or.org [mailto:coin-discuss-
>> bounces at list.coin-or.org] On Behalf Of Andrew Makhorin
>> Sent: Saturday, May 06, 2006 9:34 AM
>> To: COIN-OR
>> Subject: Re: [Coin-discuss] CoinMpsIO -- LI Bounds problem?
>>
>> Could anyone please explain about LI bound type and point out the
>> package where it was introduced for the first time? Is there
>> a (more/less official) document describing such new features of mps
>> format?
>>
>> Thank you,
>>
>> Andrew Makhorin
>>
>
>
>
>
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-- 
 		Matthew Saltzman

Clemson University Math Sciences
mjs AT clemson DOT edu
http://www.math.clemson.edu/~mjs