From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 28139 invoked by alias); 23 Jul 2002 17:44:32 -0000 Mailing-List: contact gsl-discuss-help@sources.redhat.com; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gsl-discuss-owner@sources.redhat.com Received: (qmail 28089 invoked from network); 23 Jul 2002 17:44:30 -0000 Received: from unknown (HELO sys713.kaist.ac.kr) (143.248.51.23) by sources.redhat.com with SMTP; 23 Jul 2002 17:44:30 -0000 Received: (qmail 1263 invoked from network); 23 Jul 2002 17:36:59 -0000 Received: from casad13.kaist.ac.kr (HELO sys713.kaist.ac.kr) (143.248.59.74) by 0 with SMTP; 23 Jul 2002 17:36:59 -0000 Message-ID: <3D3D95F5.3000307@sys713.kaist.ac.kr> Date: Tue, 23 Jul 2002 10:44:00 -0000 From: "Dan, Ho-Jin" User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; ko-KR; rv:1.0.0) Gecko/20020530 X-Accept-Language: ko-kp, ko, en-us, en MIME-Version: 1.0 To: sliwa@euv-frankfurt-o.de CC: gsl-discuss@sources.redhat.com Subject: Re: Determinant of a matrix References: <3D3D8C3A.8030003@euv-frankfurt-o.de> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-SW-Source: 2002-q3/txt/msg00085.txt.bz2 You can decompose a symmetric matrix L D L^T which is not singular, where the value of diagonal elements of L is one. The determinamt of a matrix can be calculated by the multiplication of all elements of D. If a matrix is singular, the determinant is zero as you know. I think this method is correct and can be generalized unsymmetric matirx. But I'm not sure that this is the most efficient. Please *check* the algebra text. I have no reference at near hand now. Best Regards, Dan, Ho-Jin Przemyslaw Sliwa wrote: > Does anyone know how to compute in an easy way the determinant of a > real matrix? > > Thanx for hinst. > > Przem > > > -- :wq