[OS] Common expressions -- user defined variables

[Robert Fourer]

These would be declarations of the form

   var <name> {<indexing>} = <expr involving vars> ;

which define variables in terms of other variables.  The same with a := is a
different situation -- the expression specifies only initial values for the
variables.

-- Bob


> -----Original Message-----
> From: optimizationservices at googlegroups.com
> [mailto:optimizationservices at googlegroups.com] On Behalf Of Leo Lopes
> Sent: Monday, March 10, 2008 11:04 AM
> To: optimizationservices at googlegroups.com
> Subject: Re: [OS] Common expressions -- user defined variables
> 
> 
> What do you mean by common expressions? Definitions using a := at
> declaration time?
> 
> Thanks,
> Leo.
> 
> On Sun, Mar 9, 2008 at 11:40 PM, Kipp Martin <Kipp.Martin at chicagogsb.edu>
> wrote:
> >
> >  Hello:
> >
> >  The current trunk version (1701) of OS now supports AMPL common
> >  expressions (user-defined variables).  If your nl file has user defined
> >  variables
> >
> >  OSSolverService -solver solverName -nl path/to/file/fileName.nl
> >
> >  should now work instead of throwing an exception.
> >
> >  Please report any problems with this.
> >
> >  Thanks
> >
> >
> >  --
> >  Kipp Martin
> >  Professor of Operations Research
> >  and Computing Technology
> >  Graduate School of Business
> >  University of Chicago
> >  5807 South Woodlawn Avenue
> >  Chicago, IL 60637
> >  773-702-7456
> >  kipp.martin at chicagogsb.edu
> >  http://gsbkip.chicagogsb.edu
> >  http://www.coin-or.org
> >  _______________________________________________
> >  OS mailing list
> >  OS at list.coin-or.org
> >  http://list.coin-or.org/mailman/listinfo/os
> >
> >  >
> >
> 
> 
> 
> --
> ========================================================================
> Leonardo B. Lopes                                    leo at sie.arizona.edu
> Assistant Professor                                        (520)621-2342
> SIE - University of Arizona  http://www.sie.arizona.edu/faculty/leolopes
> 
> 


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