From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: why are there [v e c t o r s] in Lisp? Date: Sat, 17 Oct 2015 06:56:03 +0200 Organization: Aioe.org NNTP Server Message-ID: <876126w0t8.fsf@debian.uxu> References: <87oafzpqfj.fsf@debian.uxu> <87lhb2cjy5.fsf@kuiper.lan.informatimago.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1445057423 3877 80.91.229.3 (17 Oct 2015 04:50:23 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 17 Oct 2015 04:50:23 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sat Oct 17 06:50:19 2015 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZnJRi-0003vT-Vl for geh-help-gnu-emacs@m.gmane.org; Sat, 17 Oct 2015 06:50:19 +0200 Original-Received: from localhost ([::1]:57013 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZnJRi-0001Xa-6w for geh-help-gnu-emacs@m.gmane.org; Sat, 17 Oct 2015 00:50:18 -0400 Original-Path: usenet.stanford.edu!news.kjsl.com!feeder.erje.net!1.eu.feeder.erje.net!nntpspool01.opticnetworks.net!aioe.org!.POSTED!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 19 Original-NNTP-Posting-Host: pZIsxnkulx3YWgEFEeI9SA.user.speranza.aioe.org Original-X-Complaints-To: abuse@aioe.org User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux) X-Notice: Filtered by postfilter v. 0.8.2 Cancel-Lock: sha1:a8lJT3TLu3JZmEgHRB/Ymp/Ed48= Mail-Copies-To: never Original-Xref: usenet.stanford.edu gnu.emacs.help:215409 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:107693 Archived-At: "Pascal J. Bourguignon" writes: > The essence of vector is to define a direction and > a magnitude. Notably for vector spaces without > a finite basis, V/|V| is still the direction of the > vector V, intrinsically (every unitary vector is > a distinct direction). Yes, but perhaps what Aurélien Aptel said (vectors in linear algebra being a tool concept to model just about anything) is analogous to the vectors of Elisp being data structures that can hold data for virtually any purpose? And then, why aren't the Elisp vectors simply called "arrays" like everywhere else? -- underground experts united http://user.it.uu.se/~embe8573