From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 575 invoked by alias); 1 Jul 2010 20:24:28 -0000 Received: (qmail 559 invoked by uid 22791); 1 Jul 2010 20:24:27 -0000 X-SWARE-Spam-Status: No, hits=-1.0 required=5.0 tests=AWL,BAYES_40,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: sourceware.org Received: from mail-gx0-f169.google.com (HELO mail-gx0-f169.google.com) (209.85.161.169) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 01 Jul 2010 20:24:23 +0000 Received: by gxk4 with SMTP id 4so369131gxk.0 for ; Thu, 01 Jul 2010 13:24:21 -0700 (PDT) Received: by 10.101.147.32 with SMTP id z32mr13411751ann.227.1278015861215; Thu, 01 Jul 2010 13:24:21 -0700 (PDT) MIME-Version: 1.0 Received: by 10.151.84.3 with HTTP; Thu, 1 Jul 2010 13:24:06 -0700 (PDT) From: Jonathan Leto Date: Thu, 01 Jul 2010 20:24:00 -0000 Message-ID: Subject: =?ISO-8859-1?Q?Calculating_the_square_root_of_n=D7n_positive=2Dsemidef?= =?ISO-8859-1?Q?inite_real_matrix_A?= To: gsl-discuss@sourceware.org Cc: "Laskin, Nick" Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Mailing-List: contact gsl-discuss-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gsl-discuss-owner@sourceware.org X-SW-Source: 2010-q3/txt/msg00000.txt.bz2 Howdy, I maintain the Math::GSL CPAN [0] module and recently a user asked me how to calculate the square root of a n=D7n positive-semidefinite real matrix A. I browsed through the GSL documentation and did not immediately find anything. Is there a way to do this currently with GSL? Thanks, Duke [0] - http://search.cpan.org/dist/Math-GSL/ --=20 Jonathan "Duke" Leto jonathan@leto.net http://leto.net