Subject: What about "conditionnement" of a matrix?
From: Daniel Lakeland
Date: Sun, 19 Aug 2007 09:04:45 -0700
On Sun, Aug 19, 2007 at 08:44:33AM +0200, Patrick Gelin wrote:
> Barton Willis wrote:
>
> > Please correct me if I'm wrong, but I'm guessing that you want to evaluate
> > || A || * ||A^-1||, where A is a matrix and || || is a matrix norm
> > (in English, the 'condition number'). Yes, Maxima can do this (using
> > version 5.12)
> >
> I'm not sure your formula is what I'm trying to do because I know the
> concept but not the formula... In english the french word translating in
> english is: conditioning
Yes, your concept is called the "condition number" in english, I do
not think that it is an integer in general. And the formula given is
correct, although there are different numbers depending on which norm
you use.
--
Daniel Lakeland
dlakelan at street-artists.org
http://www.street-artists.org/~dlakelan