[GiNaC-devel] [SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-611-g26840ecc

[Richard B. Kreckel]

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commit 26840ecc367d9f9dd4e3758233be1bdd3563cd8a
Author: Vitaly Magerya <vmagerya at gmail.com>
Date:   Wed Jun 13 23:07:45 2018 +0200

    Add optional matrix::rank() algorighm selection.
    
    Before, matrix::rank() was hardcoded to use Bareiss elimination,
    which for some matrices is way too slow (and I had to work around
    this limitation in my own code). I propose adding an argument that
    will allow users to select which elimination scheme to use. The
    argument is the same as matrix::solve() takes (so, solve_algo::*).
    
    I've tried to mimic how a similar argument was added to
    matrix::inverse() by keeping the current set of rank() functions
    and defining separate ones with the 'algo' argument, with the
    old ones calling the new ones with solve_algo::automatic. This
    is instead of using default argument values.
    
    I've also put the code that makes the automatic selection of
    the elimination method into a separate function so that both
    matrix::solve() and matrix::rank() could share it. There's a bit
    of similar code in matrix::determinant(), but since the self
    of determinant algorithms is different from the elimination
    algorithms, it's not clear if these two could be unified.

-----------------------------------------------------------------------

Summary of changes:
 doc/tutorial/ginac.texi |  14 +++----
 ginac/matrix.cpp        | 108 ++++++++++++++++++++++++++----------------------
 ginac/matrix.h          |   4 ++
 3 files changed, 69 insertions(+), 57 deletions(-)


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GiNaC -- a C++ library for symbolic computations