genius r576 - in trunk: . lib/linear_algebra src

[jirka svn gnome org]

Author: jirka
Date: 2007-10-23 19:33:29 +0100 (Tue, 23 Oct 2007)
New Revision: 576
ViewCVS link: http://svn.gnome.org/viewcvs/genius?rev=576&view=rev

Modified:
   trunk/ChangeLog
   trunk/lib/linear_algebra/linear_algebra.gel
   trunk/src/funclib.c
   trunk/src/matop.c
Log:

Tue Oct 23 13:33:42 2007  Jiri (George) Lebl <jirka 5z com>

	* lib/linear_algebra/linear_algebra.gel: slightly optimize
	  PivotColumns by removing unnecessary separators

	* src/matop.c, src/funclib.c: when computing det be smart about
	  matrices in rref form.  This way once we make a matrix rref,
	  we can use det to check if it is singular very quickly.  Also
	  set the rref flag on identity matrices.