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GLPK 4.55 Release Information
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Release date: August 22, 2014
GLPK (GNU Linear Programming Kit) is intended for solving large-scale
linear programming (LP), mixed integer linear programming (MIP), and
other related problems. It is a set of routines written in ANSI C89 and
organized as a callable library.
In this release:
Some internal (non-API) routines to estimate the condition of
the basis matrix were added. These routines are mainly intended
to be used by the simplex-based solvers.
Two open modes "a" and "ab" were added to GLPK I/O routines.
Thanks to Pedro P. Wong <d00...@taipower.com.tw> for bug report.
Minor bug was fixed in the solver glpsol (command-line options
--btf, --cbg, and --cgr didn't work properly).
A serious bug was fixed in a basis factorization routine used
on the dense phase. (The bug might appear only if the number of
rows exceeded sqrt(2**31) ~= 46,340 and caused access violation
exception because of integer overflow.) Thanks to Mark Meketon
<marc.meke...@oliverwyman.com> for bug report.
Two API routines glp_alloc and glp_realloc were documented.
Thanks to Brian Gladman <b...@gladman.plus.com> for suggestion.
Translation of the document "Modeling Language GNU MathProg"
to Spanish was included (in LaTeX and pdf formats). Thanks to
Pablo Yapura <y...@agro.unlp.edu.ar> for contribution.
See GLPK web page at <http://www.gnu.org/software/glpk/glpk.html>.
GLPK distribution can be ftp'ed from <ftp://ftp.gnu.org/gnu/glpk/> or
from some mirror ftp sites; see <http://www.gnu.org/order/ftp.html>.
MD5 check-sum is the following:
c632a7a631b8aed02e28eafcd99477f7 *glpk-4.55.tar.gz
GLPK is also available as a Debian GNU/Linux package. See its web page
at <http://packages.debian.org/stable/math/glpk>.
Precompiled GLPK binaries (lib, dll, exe) for 32- and 64-bit MS Windows
can be downloaded from <http://winglpk.sourceforge.net/>.
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