This file records noteworthy changes.
-1.4.0 (<date>)
+1.6.5 (27 July 2015)
+* Fix pow(+(...),2).expand() where the sum contained roots of expressions.
+* Speed-up pow(+(...),n).expand() where n > 3.
+* Fix a crash in PolyLogs of rational numbers.
+
+1.6.4 (8 May 2015)
+* Fix pow(+(...),2).expand() where the sum contained roots of rationals.
+* Various improvements for info(info_flags::nonnegative).
+* Make power::expand() (x*p)^c -> x^c * p^c, if p>0.
+* Fix normal() where nested functions occur multiple times.
+* Add optional explicit derivatives to functions and use it in abs(),
+ imag_part(), real_part().
+* Evaluate abs(z)^(2n) -> z^n * conjugate(z)^n.
+
+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.
+* Fixed several memory leaks in power::eval().
+* Fixed the substitution algorithm that led to wrong results (exp(log(x))->x).
+* Fixed a bug in add:eval() (real_part() had returned wrong results).
+* Fixed infinite loop bug when unarchiving realsymbol and possymbol.
+* 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.
+
+1.5.8 (06 July 2010)
+* Changed default behaviour of conjugate() for user-defined functions to avoid
+ wrong evaluations. A user-defined conjugate_func must now be explicitly
+ registered.
+* Fixed: Parser now handles abbreviations as advertized in the manual.
+* Fixed two bugs in the GCD code (one infinite loop, one miscalculation).
+* Fixed dangerous iterator use.
+* Fixed a memory leak in excompiler.
+* Fixed several syntax issues wrt to gcc 4.5 and wrt to compile option -std=cxx0x.
+* Fixed a wrong URL and a texinfo problem in the manual.
+* Added degree_vector() utility function.
+
+1.5.7 (29 March 2010)
+* Fixed a bug in the GCD code (infinite loop in pgcd()).
+* Fixed a bug in atan2() (division by zero error for atan2(x,0) if x is a
+ negative and composite term).
+* Products now correctly set info_flags::negative and info_flags::negint.
+
+1.5.6 (28 January 2010)
+* Fixed compile problem with gcc 3.4.
+* Improved excompiler: The ginac-excompiler script will only be installed if
+ excompiler is supported and enabled.
+
+1.5.5 (04 November 2009)
+* Correct libtool versioning.
+
+1.5.4 (02 November 2009)
+* Default parser now can again read in user defined classes.
+* Add mul::info() and add::info() support for numeric info_flags (GiNaC now can
+ detect that the sum or product of a number of positive expressions is again a
+ positive expression).
+* Fixed cast that caused compile error on 64bit machines.
+* Fixed incorrect uses of STL iterators.
+* Removed subdirectory debian.
+* Output LaTeX-symbols using \mathrm, instead of \mbox.
+
+1.5.3 (30 July 2009)
+* The parser now understands user-defined functions by default. The identifier
+ names can now contain underscores.
+
+1.5.2 (10 July 2009)
+* Fixed documentation of return_type_info()
+* Fixed cstdio include issue.
+* GiNaC now requires at least version 1.2.2 of cln.
+
+1.5.1 (25 February 2009)
+* Fixed compiling problems with GNU g++ 3.4.
+* Work around weird C++ RTTI behaviour on woe32 so GiNaC works on MinGW again.
+
+1.5.0 (17 February 2009)
+* Added polynomial factorization.
+* New, faster (recursive descent) expression parser.
+* Faster GCD computation.
+* gcd() now allows the user to override (some of the) heuristics.
+* Writing extensions classes is simpler now:
+ - Replaced custom RTTI by standard C++ RTTI.
+ - Definition of archiving methods now optional when declaring a new GiNaC class.
+* Fixed recursion in polynomial divide that caused a significant slowdown in
+ sqrfree().
+* Improved lsolve() of systems containing non-numeric coefficients.
+* Removed implicit conversions from cl_N to numeric.
+* Improved configuration and compatibility.
+
+1.4.4 (7 Nov 2008)
+* Fixed a bug in the multiple polylogarithms Li/G that caused imaginary parts
+ of the arguments to be ignored.
+* Fixed archiving of complex numbers.
+* Made the behaviour of class function more consistent with respect to
+ ncmul::eval().
+* Fixed bug in power::is_polynomial.
+* Improved heur_gcd() so it can handle rational polynomials.
+* Improved build scripts.
+
+1.4.3 (04 April 2008)
+* Fixed bug in numerical evaluation of multiple polylogarithms and
+ alternating multiple zeta values introduced in version 1.4.2.
+* Nielsen polylog now invalidates its lookup tables in case the precision
+ (Digits) has been changed.
+* Added new checks for recent bugs in the numerical evaluation of Li and zeta.
+
+1.4.2 (03 April 2008)
+* Fixed VPATH building of documentation.
+* Fixed bug in numerical evaluation of multiple polylogarithms for arguments
+ equal to certain roots of unity (thanks to Jianqiang Zhao).
+* Fixed check for memory leakage in parser.
+* Made internal function coerce() standard compliant.
+* Improved lsolve() of systems containing non-numeric coefficients.
+* Improved automatic test programs. Now they work on MinGW and Cygwin as well.
+
+1.4.1 (21 November 2007)
+* Fixed memory leak in ginac_yylex().
+* Fixed memory leaks in mul::eval() and power::eval().
+* Fixed macro checking for version of libreadline (Mac OS X).
+* Fixed broken preprocessor instruction in excompiler.cpp.
+* Fixed broken module loading in excompiler.cpp.
+* info(info_flags::has_indices) now works for sums and products.
+* Improved mul::expand().
+* Improved CLN output.
+
+1.4.0 (31 August 2007)
* New tinfo mechanism.
* Removed rtt from class symbol.
* Faster archiving by adding a map from strings to indices in the atoms vector.
* New flag for positive symbols/numbers, added possymbol class.
* Added programming examples in doc/examples
-1.3.8 (<date>)
+1.3.8 (28 August 2007)
* Drop support of ginac-config and ginac.m4. Please use pkg-config instead.
* atan2(y,x) branch cut correction.
* Fixed bug in series expansion.
* Correct csrc output for idx and fderivative.
* Improved handling of convergence transformationis for Li/G.
* Fix compilation issues with prereleases of GCC 4.3.
+* info_flags::expanded added.
+* input_parser also accepts pow().
+* texinfo.tex removed from package.
1.3.7 (05 February 2007)
* Fixed bug in expansion of power.
git://www.ginac.de / ginac.git / blobdiff