Path: csiph.com!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path: <python-python-list@m.gmane.org>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.134
X-Spam-Level: *
X-Spam-Evidence: '*H*': 0.74; '*S*': 0.01; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'inverse': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'thanks,': 0.18; 'code,': 0.18; 'url:wiki': 0.26; 'header:X-Complaints-To:1': 0.28; 'url:wikipedia': 0.29; 'array': 0.29; "i'm": 0.29; 'url:home': 0.33; 'to:addr:python-list': 0.33; 'another': 0.33; 'nov': 0.35; 'next': 0.35; 'received:org': 0.36; 'but': 0.36; 'url:org': 0.36; 'charset:us-ascii': 0.36; 'subject:: ': 0.38; 'url:en': 0.38; 'gives': 0.39; 'to:addr:python.org': 0.39; 'where': 0.40; 'header:Received:5': 0.40; 'production': 0.63; 'different': 0.63; 'url:%1': 0.68; 'direct': 0.69; 'square': 0.75; '(is': 0.84; '2x2': 0.84; 'divide': 0.84; 'dennis': 0.91; 'received:108': 0.91
X-Injected-Via-Gmane: http://gmane.org/
To: python-list@python.org
From: Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject: Re: Division matrix
Date: Tue, 13 Nov 2012 13:48:00 -0500
Organization: > Bestiaria Support Staff <
References: <98b451e1-5cd5-46e9-8be4-59dcc835700b@googlegroups.com> <CAN1F8qUScDpn2Dz_cJreBAidy8sxZSx8+SzgWs1x809s56EnVg@mail.gmail.com> <CAH+9R7AaU_Ke2tPe1T-0Be2JhTW+Eg_gX59s=4KOVDP7Yc95Hg@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Gmane-NNTP-Posting-Host: adsl-108-79-222-185.dsl.klmzmi.sbcglobal.net
X-Newsreader: Forte Agent 3.3/32.846
X-No-Archive: YES
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <http://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.3641.1352832471.27098.python-list@python.org>
Lines: 22
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1352832471 news.xs4all.nl 6893 [2001:888:2000:d::a6]:38841
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:33258

On Tue, 13 Nov 2012 10:19:43 -0200, Cleuson Alves <cleuson.o@gmail.com>
declaimed the following in gmane.comp.python.general:

> Thanks, I'm starting to plan now, so I'm still confused with the production
> code, but what I need is to divide array 2x2 or 3x3.
> I still can not!

	Divide it by what? A scalar... Another square matrix of the same
size... Or a square matrix of a different size (is that even
possible?)...

	Based
http://en.wikipedia.org/wiki/Division_%28mathematics%29#Division_of_matrices
 upon, I can understand where the need for the inverse comes from -- and
multiplication by the inverse gives the "division". Next up,
http://en.wikipedia.org/wiki/Invertible_matrix#Inversion_of_2.C3.972_matrices
gives direct formulations for 2x2 and 3x3 matrices.

-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
        wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/