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From: Jay Belanger <belanger@truman.edu>
Cc: belanger@truman.edu
Subject: Re: Non-Commutative calculations in Calc, Revisited
Date: Thu, 06 Oct 2005 08:16:15 -0500	[thread overview]
Message-ID: <878xx66b1c.fsf@vh213602.truman.edu> (raw)
In-Reply-To: mailman.9745.1128461080.20277.help-gnu-emacs@gnu.org


Neon Absentius <absent@sdf.lonestar.org> writes:

> When in non-commutative (aka `matrix') mode calc calculates 
> (a b)^-1 to be a^-1 b^-1 instead of the correct b^-1 a^-1.
>
> Actually there is a more general bug.  It calculates (a b)^n 
> to be a^n b^n.  I think this rule should be removed when a and 
> be don't commute.  Furthermore a special rule should be included 
> that deals with the case n=-1. 

Yes; you're right.
Fixes should be commited to cvs tomorrow afternoon at the latest.

Thanks,
Jay

       reply	other threads:[~2005-10-06 13:16 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <mailman.9745.1128461080.20277.help-gnu-emacs@gnu.org>
2005-10-06 13:16 ` Jay Belanger [this message]
2005-10-06 13:42   ` Non-Commutative calculations in Calc, Revisited David Kastrup
2005-10-06 16:17     ` Jay Belanger
2005-10-06 18:23       ` Neon Absentius
2005-10-06 18:01     ` Neon Absentius
2005-10-07  0:47       ` Neon Absentius
     [not found]       ` <mailman.10168.1128646105.20277.help-gnu-emacs@gnu.org>
     [not found]         ` <wi7jcqt9ep.fsf@dms.auburn.edu>
2005-10-07  2:15           ` Neon Absentius
     [not found]           ` <mailman.10178.1128651397.20277.help-gnu-emacs@gnu.org>
2005-10-07  7:26             ` David Kastrup
     [not found]     ` <mailman.10119.1128621714.20277.help-gnu-emacs@gnu.org>
2005-10-07  3:59       ` Jay Belanger
2005-10-07 21:31         ` Jay Belanger
2005-10-04 21:23 Neon Absentius

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