[GiNaC-devel] [SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-405-ge5c76f6

[Alexei Sheplyakov]

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- Log -----------------------------------------------------------------
commit e5c76f659e2e882da3d5dba60502d6851f782bf3
Author: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>
Date:   Sun Nov 3 22:21:00 2013 +0200

    Expansion rules for exp(), log(), and abs().
    
    exp(a + b) -> exp(a)*exp(b)
    log(a*b) -> log(a) + log(b)
    abs(z*w) -> abs(z)*abs(w)
    
    log and exp are transformed only if expand_options::expand_transcendental
    is given.
    
    Signed-off-by: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>

commit 5a3641098c88d3c6ea0765df65b801312ecfb91b
Author: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>
Date:   Sat Nov 2 21:06:53 2013 +0200

    Introduce expand_options::expand_transcendental.
    
    In general expand() treats the argument as a rational expression (and
    leave transcendental functions as they are). However sometimes it's
    convenient to expand transcendental functions too, like
    
    log(a*b) = log(a) + log(b)
    exp(a + b) = exp(a)*exp(b)
    
    Applying such transformation by default doesn't seem to be a smart idea
    (think of log(p^2/mu^2) transformed to 2*log(p) - 2*log(mu)). Therefore
    introduce expand_options::expand_transcendental. As the name implies expand()
    tries to transform transcendental functions only if this flag is set.
    
    Signed-off-by: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>

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

Summary of changes:
 check/exam_inifcns.cpp  |   65 ++++++++++++++++++++++++++++++++++++++++++
 doc/tutorial/ginac.texi |   53 ++++++++++++++++++++++++++++++++++
 ginac/flags.h           |    3 +-
 ginac/inifcns.cpp       |   22 ++++++++++++++
 ginac/inifcns_trans.cpp |   72 +++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 214 insertions(+), 1 deletions(-)


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GiNaC -- a C++ library for symbolic computations