[Coin-osi-devel] loadProblem / default row parameters => different constraints

Lou Hafer lou at cs.sfu.ca
Thu Jul 26 19:12:03 EDT 2007


Folks,

	While polishing the Osi unitTest, this little anomaly slapped me in the
face.

	There are two versions of loadProblem.  One describes row bounds with an
upper and lower bound; the other with a sense, rhs, range triplet.  The default
values specified in the documentation will produce different constraints:

  lb		-infinity	=>	-inf <= ax <= inf
  ub		 infinity

  sense		 'G' ( >= )
  rhs		 0		=>	ax >= 0
  range		 0

This isn't necessarily bad, but I'm wondering if it was a conscious design 
choice. Does anyone's memory go this far back?

							Lou




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