From: Nikolaj Schumacher <me@nschum.de>
To: pjb@informatimago.com (Pascal J. Bourguignon)
Cc: help-gnu-emacs@gnu.org
Subject: Re: Working with constansts
Date: Tue, 12 May 2009 12:34:35 +0200 [thread overview]
Message-ID: <m2zldiehj8.fsf@nschum.de> (raw)
In-Reply-To: <878wl4zzml.fsf@galatea.local> (Pascal J. Bourguignon's message of "Sun, 10 May 2009 18:33:38 +0200")
> 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
next prev parent reply other threads:[~2009-05-12 10:34 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-10 15:25 Working with constansts Decebal
2009-05-10 16:19 ` Pascal J. Bourguignon
2009-05-10 16:20 ` Richard Riley
2009-05-10 16:33 ` Pascal J. Bourguignon
2009-05-12 10:34 ` Nikolaj Schumacher [this message]
2009-05-10 17:02 ` Drew Adams
2009-05-10 17:28 ` Richard Riley
2009-05-11 7:39 ` Tassilo Horn
[not found] ` <mailman.6953.1241976532.31690.help-gnu-emacs@gnu.org>
2009-05-10 18:17 ` Pascal J. Bourguignon
2009-05-11 1:36 ` Richard Riley
2009-05-11 6:29 ` Pascal J. Bourguignon
2009-05-12 10:06 ` Nikolaj Schumacher
[not found] ` <mailman.7056.1242122790.31690.help-gnu-emacs@gnu.org>
2009-05-12 11:54 ` Pascal J. Bourguignon
2009-05-18 10:55 ` Nikolaj Schumacher
[not found] ` <7ceiuuczad.fsf@pbourguignon.informatimago.com>
[not found] ` <mailman.7379.1242644154.31690.help-gnu-emacs@gnu.org>
2009-05-18 12:20 ` Pascal J. Bourguignon
2009-05-18 19:19 ` Nikolaj Schumacher
2009-05-10 18:59 ` Barry Margolin
2009-05-11 1:38 ` Richard Riley
2009-05-12 9:44 ` Nikolaj Schumacher
[not found] ` <mailman.7052.1242121473.31690.help-gnu-emacs@gnu.org>
2009-05-12 11:43 ` Pascal J. Bourguignon
2009-05-13 4:59 ` Barry Margolin
2009-05-13 13:41 ` Ralf Wachinger
2009-05-13 21:23 ` Barry Margolin
2009-05-11 9:58 ` Thien-Thi Nguyen
[not found] ` <mailman.6988.1242036217.31690.help-gnu-emacs@gnu.org>
2009-05-12 1:31 ` Barry Margolin
2009-05-11 8:27 ` Decebal
2009-05-12 9:46 ` Nikolaj Schumacher
2009-05-10 16:31 ` Drew Adams
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