From a7551d2744155167ca15d14248de6cc7b6593260 Mon Sep 17 00:00:00 2001 From: adam Date: Tue, 2 Jul 2013 10:17:37 +0000 Subject: Changes 4.51: Singleton and dense phases were implemented on computing LU-factorization with Gaussian elimination. The singleton phase is a feature that allows processing row and column singletons on initial elimination steps more efficiently. The dense phase is a feature used on final elimination steps when the active submatrix becomes relatively dense. It significantly reduces the time needed, especially if the active submatrix fits in CPU cache, and improves numerical accuracy due to full pivoting. The API routine glp_adv_basis that constructs advanced initial LP basis was replaced by an improved version, which (unlike the old version) takes into account numerical values of constraint coefficients. The proximity search heuristic for MIP was included in the GLPK integer optimizer glp_intopt. On API level the heuristic can be enabled by setting the parameter ps_heur in glp_iocp to GLP_ON. This feature is also available in the solver glpsol through command-line option '--proxy'. A bug was fixed that caused numerical instability in the FPUMP heuristic. --- math/glpk/Makefile | 4 ++-- math/glpk/distinfo | 8 ++++---- 2 files changed, 6 insertions(+), 6 deletions(-) (limited to 'math/glpk') diff --git a/math/glpk/Makefile b/math/glpk/Makefile index 70c5446aa5b..0750a554404 100644 --- a/math/glpk/Makefile +++ b/math/glpk/Makefile @@ -1,6 +1,6 @@ -# $NetBSD: Makefile,v 1.36 2013/05/29 20:08:08 adam Exp $ +# $NetBSD: Makefile,v 1.37 2013/07/02 10:17:37 adam Exp $ -DISTNAME= glpk-4.50 +DISTNAME= glpk-4.51 CATEGORIES= math MASTER_SITES= ${MASTER_SITE_GNU:=glpk/} diff --git a/math/glpk/distinfo b/math/glpk/distinfo index 9fc2086a0ad..da39d8b00f5 100644 --- a/math/glpk/distinfo +++ b/math/glpk/distinfo @@ -1,5 +1,5 @@ -$NetBSD: distinfo,v 1.29 2013/05/29 20:08:08 adam Exp $ +$NetBSD: distinfo,v 1.30 2013/07/02 10:17:37 adam Exp $ -SHA1 (glpk-4.50.tar.gz) = a3ddbc59e5687381d5724d86391a5e24a8fe094a -RMD160 (glpk-4.50.tar.gz) = 22cb3889e53eb6b48597c0b502a2c3c16ad48b8a -Size (glpk-4.50.tar.gz) = 2806395 bytes +SHA1 (glpk-4.51.tar.gz) = 5a633b1fe8c4ad70e232effaef96f021c52cd390 +RMD160 (glpk-4.51.tar.gz) = a1ce6bb9e7b854e8380767cb33d7a341c70edc81 +Size (glpk-4.51.tar.gz) = 2785680 bytes -- cgit v1.2.3