Return-Path: X-Original-To: apmail-commons-issues-archive@minotaur.apache.org Delivered-To: apmail-commons-issues-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id F0FE77821 for ; Wed, 20 Jul 2011 17:21:24 +0000 (UTC) Received: (qmail 21761 invoked by uid 500); 20 Jul 2011 17:21:22 -0000 Delivered-To: apmail-commons-issues-archive@commons.apache.org Received: (qmail 21664 invoked by uid 500); 20 Jul 2011 17:21:22 -0000 Mailing-List: contact issues-help@commons.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: issues@commons.apache.org Delivered-To: mailing list issues@commons.apache.org Received: (qmail 21655 invoked by uid 99); 20 Jul 2011 17:21:21 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 20 Jul 2011 17:21:21 +0000 X-ASF-Spam-Status: No, hits=-2001.1 required=5.0 tests=ALL_TRUSTED,RP_MATCHES_RCVD X-Spam-Check-By: apache.org Received: from [140.211.11.116] (HELO hel.zones.apache.org) (140.211.11.116) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 20 Jul 2011 17:21:19 +0000 Received: from hel.zones.apache.org (hel.zones.apache.org [140.211.11.116]) by hel.zones.apache.org (Postfix) with ESMTP id 296654B2A9 for ; Wed, 20 Jul 2011 17:20:58 +0000 (UTC) Date: Wed, 20 Jul 2011 17:20:58 +0000 (UTC) From: "greg sterijevski (JIRA)" To: issues@commons.apache.org Message-ID: <1465330685.8431.1311182458166.JavaMail.tomcat@hel.zones.apache.org> Subject: [jira] [Created] (MATH-624) Need a method to solve upper and lower triangular systems MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 X-Virus-Checked: Checked by ClamAV on apache.org Need a method to solve upper and lower triangular systems --------------------------------------------------------- Key: MATH-624 URL: https://issues.apache.org/jira/browse/MATH-624 Project: Commons Math Issue Type: New Feature Affects Versions: 3.0 Environment: Java Reporter: greg sterijevski Fix For: 3.0 I have run into a need to solve triangular systems. While (as Phil and Ted point out) I could use the LU and QR decompositions, it seems cleaner to have a couple of static functions which do this. I am including a patch to provide an implementation and the tests. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira