[GiNaC-list] Release 1.6.3
Richard B. Kreckel
kreckel at in.terlu.de
Fri Nov 28 09:41:03 CET 2014
Hi everybody,
Alexei and I have prepared a new release and are happy to announce that
GiNaC 1.6.3 is out and available. These are the changes:
* New expand_options::expand_transcendental. GiNaC will apply additional
rules when expanding expressions if this option is specified, i.e.
log(a*b) -> log(a) + log(b)
exp(a + b) -> exp(a)*exp(b)
* Functions can define a custom expand() and info() now.
* Automatically rewrite (x^{-1})^c -> x^{-c} for positive c.
* Transform abs(x)^n -> x^n if x is real and n is even.
* Improved power::info(): power with a real base and even exponent
reports that it's non-negative.
* Fixed spurious match failure due to expairseq::match() bug:
> match(sin(y)*exp(b)+sin(x)*exp(a), sin($0)*exp(a)+exp(b)*sin($1))
FAIL
* Fixed power::is_polynomial() and mul::is_polynomial() computation.
* factor_univariate correctly handles polynomials over rationals (no
segfaults any more).
* Fixed an infinite loop in factor_multivariate due to incorrect
handling of polynomials having a leading coefficient being a sum
with a non-trivial integer content.
* Fixed numeric evaluation of generalized multiple polylogarithms for
real and negative argument.
* Avoid calling log(1-x) in numeric evaluation of classical
polylogarithm.
* Fixed numeric evaluation of multiple polylogarithms (correctly set
the signs of the imaginary parts in the intermediate expression).
* Fixed numeric evaluation of Nielsen polylogs for arguments close to
the 6th root of unity or its conjugate.
* Avoid infinite recursion in series expansion of logarithm.
* numeric::info(info_flags::nonnegative) correctly handles complex
numbers with non-zero imaginary part.
* Fixed several build issues:
- libreadline and dlopen() misdetection.
- multiple definition of symbol on MinGW.
- auto* tools and texinfo being unhappy in various ways.
* GiNaC can be built with CMake now.
Regards,
-richy.
--
Richard B. Kreckel
<http://in.terlu.de/~kreckel/>
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