[Os-project-managers] Consent agenda item: Basis status

[Kipp Martin]

Horand Gassmann wrote:
> Hi guys,
> 
> I think we agreed that the basis status should be stored through an  
> array of index vectors, one for each basis status, and that the  
> different status values should be
> 
> basic
> atLower
> atUpper
> isFree
> superbasic
> unknown
> 
> I would like to propose that the index vector be stored as an  
> IntVector and not a NonNegativeIntVector as in the present draft. The  
> reason is the handling of objective rows. They can have a basis  
> status, but their index values are negative. It seems too cumbersome  
> to have to create both a BasisStatus and an ObjectiveBasisStatus type  
> just for this distinction. I propose that we verify the sign  
> restriction on the indices in code and document in the schema via  
> annotation.
> 
> Agree/Disagree?

I agree/consent.
> 
> Thanks
> 
> gus
> 
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-- 
Kipp Martin
Professor of Operations Research
and Computing Technology
Booth School of Business
University of Chicago
5807 South Woodlawn Avenue
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773-702-7456
kmartin at chicagobooth.edu
http://www.chicagobooth.edu/faculty/bio.aspx?person_id=12825325568
http://projects.coin-or.org/OS