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From: | Jay Belanger |
Subject: | Re: Bug in Calc? (was Re: Non-commutative symbolic multiplication in Calc) |
Date: | Wed, 07 Sep 2005 14:36:01 -0500 |
User-agent: | Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
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
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