From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 8538 invoked by alias); 3 Dec 2003 13:05:24 -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 8523 invoked from network); 3 Dec 2003 13:05:23 -0000 Received: from unknown (HELO smtp0.libero.it) (193.70.192.33) by sources.redhat.com with SMTP; 3 Dec 2003 13:05:23 -0000 Received: from libero.it (193.70.192.41) by smtp0.libero.it (7.0.020-DD01) id 3F6F1CE3008F8839; Wed, 3 Dec 2003 14:05:22 +0100 Date: Wed, 03 Dec 2003 13:05:00 -0000 Message-Id: Subject: Fwd:Strange error linear system MIME-Version: 1.0 X-Sensitivity: 3 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable From: "lauradiara\@libero\.it" To: "gsl-discuss" To: "help-gsl help-gsl" X-XaM3-API-Version: 4.1 (B19) X-type: 0 X-SenderIP: 193.76.233.91 X-SW-Source: 2003-q4/txt/msg00111.txt.bz2 Hi, can someone, more expert than me, tell me where is my problem? =0D I suspect than I'm not applying the rigth method. Could you give me some advice? Thanks --Laura ************** my previuos email *********** Hi all, I have seen a strange error and I don't know the reason. I have this matrix: 1x+2y=3D1 1x+2y=3D2 This linear system has no solutions (of couse): in my program (general purp= ose) I use gsl_linalg_QR_lssolve to solve this system (because its det =3D 0) an= d I obtain a solution!!!! x0 =3D -8678521507207439.000000000000000000 y =3D +4339260753603721.000000000000000000 The same result is obtained with gsl_linalg_SV_solve. I don't understand. Can someone tell me my error and give me an explanation? Thanks very much --laura