[GiNaC-devel] [SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-443-g1994570

[Richard B. Kreckel]

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commit 1994570795185f89cc848843cc53664740d20fa0
Author: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>
Date:   Sun Feb 8 20:53:55 2015 +0100

    Fixing index in tutorial.
    
    The index entry for clifford::get_metric() did not work, change it to get_metric().
    
    Signed-off-by: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>

commit aa2485821e68ea5f627d5753b41245a4cbd62fe3
Author: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>
Date:   Sun Feb 8 20:50:51 2015 +0100

    Explicit derivation of functions.
    
    Some function cannot be cleanly differentiated through the chain rule.
    For example, it is natural to define derivative of the absolute value as
    
    (abs(f))'=(f'*f.conjugate()+f*f'.conjugate())/2/abs(f)
    
    This patch adds a possibility to define derivatives of functions in this way.
    In particular the derivative of abs(), Order(), real_part(), imag_part() and
    conjugate() are defined.
    
    For example, conjugate of a derivative with respect of a real symbol
    If x is real then U.diff(x)-I*V.diff(x) represents both
    conjugate(U+I*V).diff(x) and conjugate((U+I*V).diff(x))
    Thus in this patch we use the rule
    
    conjugate(f)'=conjugate(f')
    
    for a derivative with respect to the real symbol.
    
    Signed-off-by: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>

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

Summary of changes:
 check/exam_inifcns.cpp  | 66 +++++++++++++++++++++++++++++++++++++++++++++++++
 doc/tutorial/ginac.texi | 28 ++++++++++++++++++---
 ginac/function.cppy     | 33 +++++++++++++++++++++----
 ginac/function.hppy     |  6 +++++
 ginac/function.py       |  2 +-
 ginac/inifcns.cpp       | 54 +++++++++++++++++++++++++++++++++++++++-
 6 files changed, 178 insertions(+), 11 deletions(-)


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GiNaC -- a C++ library for symbolic computations