M4RI-20120613 Release Notes

M4RI-20120613 was released in June 2012. It is available at:

http://m4ri.sagemath.org/downloads/

About M4RI

M4RI is a library for fast arithmetic with dense matrices over F2. The name M4RI comes from the first implemented algorithm: The "Method of the Four Russians" inversion algorithm published by Gregory Bard. This algorithm in turn is named after the "Method of the Four Russians" multiplication algorithm which is probably better referred to as Kronrod's method. M4RI implements asymptotically fast matrix multiplication, linear system solving, reduced row echelon forms, PLE decomposition and basic arithmetic. M4RI is used by the Sage mathematics software and the PolyBoRi library. M4RI is available under the General Public License Version 2 or later (GPLv2+).

Changes in 20120613

• fixed bug in mzd_col_swap_in_rows which would break if more than one block was used per matrix
• moved to make dist to cut releases which should improve the quality of the released tarball
• dropped -lm as it was not needed
• improved detection of libpng
• remove _startblock's from mzd_combine_weird (it ignored them anyway). fixes #47
• "long long" is not ANSI-compliant. Changed to 'word', i.e. uint64_t

Supported Platforms

make check passes on the following platforms

• x86_64 Linux (sage.math.washington, redhawk.math.washington);
• x86 OSX (bsd.math.washington);
• ia64 Linux (iras.skynet);
• x86 Linux (Pentium 4, cicero.skynet);

The code also builds in Visual Studio 10 under Windows.