CVSROOT: /cvs/purrs Module name: purrs Changes by: zolo@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=pur...