Subject: What about "conditionnement" of a matrix?
From: Patrick Gelin
Date: Mon, 20 Aug 2007 10:07:00 +0200
Daniel Lakeland wrote:
> 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.
>
>
ok, so thank you very much for your responses. I will try to calculate as
you show in your first response. Thank you!