[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Non-Commutative calculations in Calc, Revisited
From: |
David Kastrup |
Subject: |
Re: Non-Commutative calculations in Calc, Revisited |
Date: |
Thu, 06 Oct 2005 15:42:40 +0200 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
Jay Belanger <belanger@truman.edu> writes:
> 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.
Uh, what's correct about b^-1 a^-1?
Set a=[1,1], b=[1;0], then (a b)^-1 = [1], and neither b^-1 nor a^-1
exist.
This only works with a and b being square matrices.
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum
- Non-Commutative calculations in Calc, Revisited, Neon Absentius, 2005/10/04
- Re: Non-Commutative calculations in Calc, Revisited, Jay Belanger, 2005/10/06
- Re: Non-Commutative calculations in Calc, Revisited,
David Kastrup <=
- Re: Non-Commutative calculations in Calc, Revisited, Neon Absentius, 2005/10/06
- Re: Non-Commutative calculations in Calc, Revisited, Neon Absentius, 2005/10/06
- Message not available
- Message not available
- Re: Non-Commutative calculations in Calc, Revisited, Neon Absentius, 2005/10/06
- Message not available
- Message not available
- Message not available
- Re: Non-Commutative calculations in Calc, Revisited, David Kastrup, 2005/10/07
- Message not available
- Re: Non-Commutative calculations in Calc, Revisited, Jay Belanger, 2005/10/07
- Re: Non-Commutative calculations in Calc, Revisited, Jay Belanger, 2005/10/07