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* Non-Commutative calculations in Calc, Revisited
@ 2005-10-04 21:23 Neon Absentius
  0 siblings, 0 replies; 11+ messages in thread
From: Neon Absentius @ 2005-10-04 21:23 UTC (permalink / raw)


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. 

-- 
Everyone is so overwhelmed by the hospitality. And so many of the
people in the arena here, you know, were underprivileged anyway, so
this--this (she chuckles slightly) is working very well for them.
     -- Barbara Bush, about the refugees from New Orleans.

^ permalink raw reply	[flat|nested] 11+ messages in thread

end of thread, other threads:[~2005-10-07 21:31 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
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     [not found] <mailman.9745.1128461080.20277.help-gnu-emacs@gnu.org>
2005-10-06 13:16 ` Non-Commutative calculations in Calc, Revisited Jay Belanger
2005-10-06 13:42   ` 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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