[GiNaC-devel] [SCM] GiNaC -- a C++ library for symbolic computations branch, master, updated. release_1-4-0-402-g0eb0cb5

[Alexei Sheplyakov]

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- Log -----------------------------------------------------------------
commit 0eb0cb55c76ceab744847d6e66533e292774e1cb
Author: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>
Date:   Wed Sep 11 09:26:30 2013 +0100

    abs() and conjugate() provide some info() now.

commit 798d53ebb4da4e8e3865ed7bd7f31412fe2be3a7
Author: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>
Date:   Wed Sep 11 09:26:30 2013 +0100

    Make it possible to override info() for functions.
    
    Signed-off-by: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>

commit 0358859aa6bc5806805fa415db79c039af3960d6
Author: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>
Date:   Thu Aug 1 14:37:45 2013 +0100

    Power with a real base and even exponent reports that it's non-negative
    
    Signed-off-by: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>

commit 2c886a86f1d020e927d64ab2c79b20437a6bd561
Author: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>
Date:   Thu Aug 1 14:37:45 2013 +0100

    Improve abs_eval(): abs(conjugate(z)) => abs(z), ...
    
    ... abs(step(z)) => step(z)
    
    Signed-off-by: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>

commit 4e1e7c6547dafc0b0f8695f9eced2591ae816a31
Author: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>
Date:   Mon Oct 7 08:04:30 2013 +0300

    Functions can define a custom expand() now.
    
    Signed-off-by: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>

commit d916416984a857e80962239a0ee93e7216f803bb
Author: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>
Date:   Wed Jul 31 09:48:24 2013 +0100

    More evaluation rules: abs(x^n) => abs(x)^n (x > 0, n is real).
    
    A simple test is added as well.
    
    Signed-off-by: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>

commit 10365850aa3803337bfea1fc201b81b6752096d4
Author: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>
Date:   Tue Jul 30 16:40:38 2013 +0100

    Transform abs(x)^n => x^n if x is real and n is even.
    
    While at it add some .hold() to returns which cannot be processed further.
    
    Signed-off-by: Vladimir V. Kisil <kisilv at maths.leeds.ac.uk>

commit 31fef4a6bc14afa46a297b3b87f94204d6c726d5
Author: Alexei Sheplyakov <Alexei.Sheplyakov at gmail.com>
Date:   Sun Oct 13 13:16:16 2013 +0300

    mul::info(): cache the result of the positiveness/negativeness checks, ...
    
    ... and use the cached result if possible.

commit 50ed15a65e858858999be45301b3f49821cb1e71
Author: Alexei Sheplyakov <Alexei.Sheplyakov at gmail.com>
Date:   Sat Aug 3 17:01:42 2013 +0300

    Introduce status_flags::{is_positive,is_negative,purely_indefinite}
    
    Quite a number of transformations can be applied if the expression
    is known to be positive (negative) (for instance, sqrt(x^2*y^2) = x*y
    if x >= 0 and y >= 0). However the check itself might be quite expensive.
    Hence a few status_flags are introduced to cache the result.

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

Summary of changes:
 check/CMakeLists.txt     |    1 +
 check/check_mul_info.cpp |   14 +++++++
 check/exam_inifcns.cpp   |   44 +++++++++++++++++++++-
 ginac/flags.h            |   12 ++++-
 ginac/function.cppy      |   69 ++++++++++++++++++++++++++++-----
 ginac/function.hppy      |   11 +++++
 ginac/function.py        |    2 +-
 ginac/inifcns.cpp        |   95 +++++++++++++++++++++++++++++++++++++++++++---
 ginac/mul.cpp            |   27 ++++++++++++-
 ginac/power.cpp          |    2 +
 ginac/version.h          |    4 +-
 11 files changed, 256 insertions(+), 25 deletions(-)
 create mode 100644 check/check_mul_info.cpp


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