From: Jay Belanger <belanger@truman.edu>
Subject: Re: Bug in Calc? (was Re: Non-commutative symbolic multiplication in Calc)
Date: Wed, 07 Sep 2005 14:36:01 -0500 [thread overview]
Message-ID: <87vf1cpt5q.fsf@vh213602.truman.edu> (raw)
In-Reply-To: mailman.6115.1126042963.20277.help-gnu-emacs@gnu.org
Neon Absentius <absent@sdf.lonestar.org> writes:
...
> Alas, there seems to be a bug: After I give 'm v' if I ask calc to
> simplify the expression 'a b - b a' it leaves it as is which is as
> expected. However when I ask it to expand '(a+b)^2' it returns
> 'a^2 + 2 b a + b^2' which is of course wrong if a and b don't commute.
> This happens both with emacs-multi-tty (22.0.50) and whith emacs
> 21.4.1 on a Debian testing/unstable. The bug manifsts itself also
> for the expansion of '(a+b)^3' however calc expands '(x+y)(x-y)'
> into 'x^2 + y x - x y + y^2'. Strange!
This should be fixed in CVS.
Jay
prev parent reply other threads:[~2005-09-07 19:36 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.6004.1125975207.20277.help-gnu-emacs@gnu.org>
2005-09-06 14:09 ` Non-commutative symbolic multiplication in Calc Roland Winkler
2005-09-06 17:07 ` Neon Absentius
[not found] ` <mailman.6076.1126026835.20277.help-gnu-emacs@gnu.org>
2005-09-06 18:36 ` Roland Winkler
2005-09-06 19:12 ` Neon Absentius
2005-09-06 20:03 ` Jay Belanger
2005-09-06 21:33 ` Bug in Calc? (was Re: Non-commutative symbolic multiplication in Calc) Neon Absentius
2005-09-07 11:42 ` Bug in Calc? Neon Absentius
[not found] ` <mailman.6172.1126094602.20277.help-gnu-emacs@gnu.org>
2005-09-07 13:56 ` Jay Belanger
[not found] ` <mailman.6115.1126042963.20277.help-gnu-emacs@gnu.org>
2005-09-07 19:36 ` Jay Belanger [this message]
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