From: SourceForge.net <noreply@so...>  20081028 03:36:09

Bugs item #2202764, was opened at 20081028 03:36 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2202764&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Lisp Core  Taylor Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: Taylor series of sqrt(1+xy) Initial Comment: Taylor expansion results of f:sqrt(1+xy) depends on sequence: (1) taylor(f,y,0,1); taylor(%,x,0,1) works properly: 1y/2+...+(1/2+y/4+...)*x+... (2) taylor(f,x,0,1); taylor(%,y,0,1) generates bad results: 1x/2+...+(1/2+x/4+...)*y+... The square of the "bad result" is 1+xy, but it is not the narrow definition of sqrt(), which should be positive in this case.  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2202764&group_id=4933 