1 This file records noteworthy changes.
4 * Cleanup in the interface to Cint. The required version is now Cint 5.14.38.
5 * Several bugfixes in target install.
8 * IMPORTANT: Several interface changes make programs written with GiNaC
9 much clearer but break compatibility with older versions:
10 - f(x).series(x,p[,o]) -> f(x).series(x==p,o)
11 - series(f(x),x,p[,o]) -> series(f(x),x==p,o)
12 - gamma() -> tgamma() (The true Gamma function, there is now also
13 log(tgamma()), called lgamma(), in accord with ISO/IEC 9899:1999.)
15 * #include'ing ginac.h defines the preprocessor symbols GINACLIB_MAJOR_VERSION,
16 GINACLIB_MINOR_VERSION, and GINACLIB_MICRO_VERSION with the respective GiNaC
17 library version numbers.
18 * Expressions can be constructed from strings like this:
19 ex e("2*x+y", lst(x, y));
20 * ex::to_rational() provides a way to extend the domain of functions like
21 gcd() and divide() that only work on polynomials or rational functions (the
22 good old ex::subs() method reverses this process)
23 * Calling diff() on a function that has no derivative defined returns the
24 inert derivative function "Derivative".
25 * Several new timings in the check target. Some of them may be rather rude
26 at your machine, feel free to interrupt them.
29 * Some algorithms in class matrix (notably determinant) were replaced by
30 less brain-dead ones and should now have much better performance.
31 * Checks were completely reorganized and split up into three parts:
32 a) exams (small regression tests with predefined input)
33 b) checks (lenghty coherence checks with random input)
34 c) timings (for coherence and crude benchmarking)
35 * Behaviour of .evalf() was changed: it doesn't .evalf() any exponents.
36 * Expanded expressions now remember they are expanded to prevent
37 superfluous expansions.
38 * Small bugfixes and improvements in the series expansion.
40 0.5.3 (23 February 2000)
41 * A more flexible scheme for registering functions was implemented,
42 allowing for remembering, too.
45 0.5.2 (16 February 2000)
46 * Mainly fixes a bug in the packaging of release 0.5.1.
48 0.5.1 (14 February 2000)
49 * Fixes a small number of bugs.
51 0.5.0 (7 February 2000)
52 * Expressions can be written ("archived") to files and read therefrom.
53 * Addition of GiNaC-cint, which lets you write complete programs in
54 an interactive shell-like manner in your favoured programming
57 0.4.1 (13 December 1999)
58 * Series Expansion of Gamma function and some other trigonometric
59 functions at their poles works now.
60 * Many more evaluations of special functions at points where
62 * info_flags::rational doesn't return true for complex extensions
63 any more---use info_flags::crational for the old behaviour.
64 info_flags::integer and -::cinteger work similarly, the same
65 holds for types like info_flags::rational_polynomial.
67 0.4.0 (26 November 1999)
68 * First public release.