[PURRS-devel] purrs/src Expr.cc

[Tatiana Zolo]

CVSROOT:	/cvs/purrs
Module name:	purrs
Changes by:	zolo at cs.unipr.it	2002-12-15 19:52:37

Modified files:
	src            : Expr.cc 

Log message:
	Improved the object `sum' and `prod' implementing in `sum_eval()'
	and `prod_eval()' the following properties:
	\sum_{k = a}^b \alpha f(k) = \alpha \sum_{k = a}^b f(k),
	\prod_{k = a}^b \alpha f(k) = \alpha \prod_{k = a}^b f(k),
	where \alpha does not depend from k.

Patches:
http://www.cs.unipr.it/cgi-bin/cvsweb.cgi/purrs/src/Expr.cc.diff?cvsroot=purrs&r1=1.21&r2=1.22