Happy new year!

[ginac.git] / NEWS

diff --git a/NEWS b/NEWS
index d29f08d4810b1ec83d729ec1a7725273f5463e83..c9399c3c14c42b8b8342152a5e00feb5d37c51b2 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,52 @@
 This file records noteworthy changes.
 
-1.6.0 (?? May 2011)
+1.6.3 (27 November 2014)
+* 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.
+
+1.6.2 (6 November 2011)
+* Fixed the parser to read GiNaC::lst again.
+* Fixed a compile warning (relevant to openSUSE build).
+* Fixed a bug concerning the subsitutions in indexed expressions
+  (subs_options::no_index_renaming was ignored).
+
+1.6.1 (18 July 2011)
+* Fixed several internal assertions for the debug version of GiNaC.
+* More verbose report of (auto-)configuration problems.
+* Fixed a compile problem with ginsh using gcc 4.6.
+
+1.6.0 (22 May 2011)
 * Fixed compilation issues with clang.
 * Fixed compilation issues with VC++.
 * Fixed a segfault in fsolve() and improved its numerical algorithm.
@@ -11,6 +57,9 @@ This file records noteworthy changes.
 * Fixed bugs in the GCD code.
 * Fixed empty string bug in symbol::get_name().
 * Fixed bugs concerning STL vector sizes that can potentially cause segfaults.
+* Fixed a bug in is_polynomial().
+* Removed autogen dependencies.
+* Improved simplify_indexed() algorithm.
 * Changed the connection between library version and package version.
 * power::series() can handle now more expressions with singularities in the exponent.
 * Added conjugate() methods to functions cosh, sinh, tanh.