From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Nikolaj Schumacher Newsgroups: gmane.emacs.help Subject: Re: Working with constansts Date: Tue, 12 May 2009 12:34:35 +0200 Message-ID: References: <87d4ahylp3.fsf@galatea.local> <878wl4zzml.fsf@galatea.local> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1242124622 17521 80.91.229.12 (12 May 2009 10:37:02 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 12 May 2009 10:37:02 +0000 (UTC) Cc: help-gnu-emacs@gnu.org To: pjb@informatimago.com (Pascal J. Bourguignon) Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Tue May 12 12:36:52 2009 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1M3pLt-0001ck-Oi for geh-help-gnu-emacs@m.gmane.org; Tue, 12 May 2009 12:36:50 +0200 Original-Received: from localhost ([127.0.0.1]:56199 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1M3pLt-00057K-69 for geh-help-gnu-emacs@m.gmane.org; Tue, 12 May 2009 06:36:49 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1M3pJr-0004UD-RN for help-gnu-emacs@gnu.org; Tue, 12 May 2009 06:34:43 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1M3pJp-0004Sq-4r for help-gnu-emacs@gnu.org; Tue, 12 May 2009 06:34:42 -0400 Original-Received: from [199.232.76.173] (port=54187 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1M3pJp-0004Sf-0e for help-gnu-emacs@gnu.org; Tue, 12 May 2009 06:34:41 -0400 Original-Received: from mx20.gnu.org ([199.232.41.8]:59396) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1M3pJo-0001D6-5S for help-gnu-emacs@gnu.org; Tue, 12 May 2009 06:34:40 -0400 Original-Received: from dd18200.kasserver.com ([85.13.138.168]) by mx20.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1M3pJn-0006qi-9e for help-gnu-emacs@gnu.org; Tue, 12 May 2009 06:34:39 -0400 Original-Received: from thursday (f051097222.adsl.alicedsl.de [78.51.97.222]) by dd18200.kasserver.com (Postfix) with ESMTP id 44CF91809B539; Tue, 12 May 2009 12:34:39 +0200 (CEST) In-Reply-To: <878wl4zzml.fsf@galatea.local> (Pascal J. Bourguignon's message of "Sun, 10 May 2009 18:33:38 +0200") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.93 (darwin) X-Detected-Operating-System: by mx20.gnu.org: GNU/Linux 2.6 (newer, 2) X-detected-operating-system: by monty-python.gnu.org: Error: [-] ERROR: /var/run/p0f.sock: Connection refused 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:64370 Archived-At: > For example we call PI a constant. But PI is the ration between a > circle circumference and its diameter, and this ratio depends on the > curvature of the universe, so PI is not really a constant: in our > universe it depends on the altitude, or the distance to the sun, (on > the gravity in general). Certainly PI is a real constant. It is not defined by relative physical properties, but my mathematics. (In the physical universe, there is no such thing as a circle.[1]) Yes, when physicists use the word "constant", it's actually an assumption or average measurement. But code is mathematics, not physics. regards, Nikolaj Schumacher [1]: probably