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commit 0eb0cb55c76ceab744847d6e66533e292774e1cb
Author: Vladimir V. Kisil <kisilv(a)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(a)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(a)maths.leeds.ac.uk>
commit 0358859aa6bc5806805fa415db79c039af3960d6
Author: Vladimir V. Kisil <kisilv(a)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(a)maths.leeds.ac.uk>
commit 2c886a86f1d020e927d64ab2c79b20437a6bd561
Author: Vladimir V. Kisil <kisilv(a)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(a)maths.leeds.ac.uk>
commit 4e1e7c6547dafc0b0f8695f9eced2591ae816a31
Author: Vladimir V. Kisil <kisilv(a)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(a)maths.leeds.ac.uk>
commit d916416984a857e80962239a0ee93e7216f803bb
Author: Vladimir V. Kisil <kisilv(a)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(a)maths.leeds.ac.uk>
commit 10365850aa3803337bfea1fc201b81b6752096d4
Author: Vladimir V. Kisil <kisilv(a)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(a)maths.leeds.ac.uk>
commit 31fef4a6bc14afa46a297b3b87f94204d6c726d5
Author: Alexei Sheplyakov <Alexei.Sheplyakov(a)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(a)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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GiNaC -- a C++ library for symbolic computations