From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: David Kastrup Newsgroups: gmane.emacs.help Subject: Re: Non-Commutative calculations in Calc, Revisited Date: Fri, 07 Oct 2005 09:26:47 +0200 Organization: Organization?!? Message-ID: <85oe61lrd4.fsf@lola.goethe.zz> References: <878xx66b1c.fsf@vh213602.truman.edu> <851x2yu5gv.fsf@lola.goethe.zz> <20051006180113.GA24696@SDF.LONESTAR.ORG> NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: sea.gmane.org 1128670488 6219 80.91.229.2 (7 Oct 2005 07:34:48 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Fri, 7 Oct 2005 07:34:48 +0000 (UTC) Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Oct 07 09:34:45 2005 Return-path: Original-Received: from lists.gnu.org ([199.232.76.165]) by ciao.gmane.org with esmtp (Exim 4.43) id 1ENmir-0001Gn-63 for geh-help-gnu-emacs@m.gmane.org; Fri, 07 Oct 2005 09:32:53 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1ENmiq-0005th-Ea for geh-help-gnu-emacs@m.gmane.org; Fri, 07 Oct 2005 03:32:52 -0400 Original-Path: shelby.stanford.edu!newsfeed.stanford.edu!headwall.stanford.edu!newshub.sdsu.edu!npeer.de.kpn-eurorings.net!newsfeed.arcor.de!news.arcor.de!not-for-mail Original-Newsgroups: gnu.emacs.help X-Face: 2FEFf>]>q>2iw=B6, xrUubRI>pR&Ml9=ao@P@i)L:\urd*t9M~y1^:+Y]'C0~{mAl`oQuAl \!3KEIp?*w`|bL5qr,H)LFO6Q=qx~iH4DN; i"; /yuIsqbLLCh/!U#X[S~(5eZ41to5f%E@'ELIi$t^ Vc\LWP@J5p^rst0+('>Er0=^1{]M9!p?&:\z]|;&=NP3AhB!B_bi^]Pfkw User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) Cancel-Lock: sha1:grgcnZwmy+LcHif/eiHev0Iaf6s= Original-Lines: 13 Original-NNTP-Posting-Date: 07 Oct 2005 09:26:47 MEST Original-NNTP-Posting-Host: 832956f8.newsread4.arcor-online.net Original-X-Trace: DXC==IfcChcd@7gmBTbc_2cXMb:ejgIfPPlddjW\KbG]kaMhXY; eg@jLYel\WaL9I_i^hi1_LiI6ENVam3>5MOK` 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:30017 Archived-At: Neon Absentius writes: > BTW my statement that you quoted as it stands it's not true: even if > we assume that all matrices are square still we cannot necessarily > compose them unless they have the same dimensions! You can safely assume that except when the expression is invalid to start with, in which case it does not really matter much what happens to it. -- David Kastrup, Kriemhildstr. 15, 44793 Bochum