From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Roland Winkler Newsgroups: gmane.emacs.help Subject: Re: Non-commutative symbolic multiplication in Calc Date: Tue, 06 Sep 2005 16:09:36 +0200 Organization: FAU Erlangen-Nuernberg Message-ID: References: NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: sea.gmane.org 1126016013 14627 80.91.229.2 (6 Sep 2005 14:13:33 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Tue, 6 Sep 2005 14:13:33 +0000 (UTC) Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Tue Sep 06 16:13:27 2005 Return-path: Original-Received: from lists.gnu.org ([199.232.76.165]) by ciao.gmane.org with esmtp (Exim 4.43) id 1ECe9m-00077x-IJ for geh-help-gnu-emacs@m.gmane.org; Tue, 06 Sep 2005 16:10:38 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1ECeEH-0007ZM-2U for geh-help-gnu-emacs@m.gmane.org; Tue, 06 Sep 2005 10:15:17 -0400 Original-Path: shelby.stanford.edu!newsfeed.stanford.edu!news.tele.dk!news.tele.dk!small.news.tele.dk!fu-berlin.de!uni-berlin.de!news.dfncis.de!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 16 Original-X-Trace: news.dfncis.de ppbCJbRhESzixtyz76DA6ALcUZ3X+bZ/ey9XKJ7zRsdL8z User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) Cancel-Lock: sha1:QHuitVajfwbbpNkIpte+Ot6rJuQ= Original-Xref: shelby.stanford.edu gnu.emacs.help:133708 Original-To: help-gnu-emacs@gnu.org X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:29250 Archived-At: Neon Absentius writes: > Sorry if this is not the right list for this question. > > Is there a way to suspend some of the automatic simplifications that > calc performs? In particular I am interested in suspending the > assumption that multiplication is commutative. This would allow for > symbolic calculations with entities that are not necessarily numbers > or elements of some vector space. It's a pretty tricky issue to get useful results when doing analytical calculations with noncommuting variables. I doubt that you will get what you want when you just remove the assumption that multiplication is commutative. Roland