1 This file records noteworthy changes.
4 * IMPORTANT: Several interface changes make programs written with GiNaC
5 much clearer but break compatibility with older versions:
6 - f(x).series(x,p[,o]) -> f(x).series(x==p,o)
7 - series(f(x),x,p[,o]) -> series(f(x),x==p,o)
8 - gamma() -> tgamma() (The true Gamma function, there is now also
9 log(tgamma()), called lgamma(), in accord with ISO/IEC 9899:1999.)
11 * #include'ing ginac.h defines the preprocessor symbols GINACLIB_MAJOR_VERSION,
12 GINACLIB_MINOR_VERSION, and GINACLIB_MICRO_VERSION with the respective GiNaC
13 library version numbers.
14 * Expressions can be constructed from strings like this:
15 ex e("2*x+y", lst(x, y));
16 * ex::to_rational() provides a way to extend the domain of functions like
17 gcd() and divide() that only work on polynomials or rational functions (the
18 good old ex::subs() method reverses this process)
19 * Several new timings in the check target. Some of them may be rather rude
20 at your machine, feel free to interrupt them.
23 * Some algorithms in class matrix (notably determinant) were replaced by
24 less brain-dead ones and should now have much better performance.
25 * Checks were completely reorganized and split up into three parts:
26 a) exams (small regression tests with predefined input)
27 b) checks (lenghty coherence checks with random input)
28 c) timings (for coherence and crude benchmarking)
29 * Behaviour of .evalf() was changed: it doesn't .evalf() any exponents.
30 * Expanded expressions now remember they are expanded to prevent
31 superfluous expansions.
32 * Small bugfixes and improvements in the series expansion.
34 0.5.3 (23 February 2000)
35 * A more flexible scheme for registering functions was implemented,
36 allowing for remembering, too.
39 0.5.2 (16 February 2000)
40 * Mainly fixes a bug in the packaging of release 0.5.1.
42 0.5.1 (14 February 2000)
43 * Fixes a small number of bugs.
45 0.5.0 (7 February 2000)
46 * Expressions can be written ("archived") to files and read therefrom.
47 * Addition of GiNaC-cint, which lets you write complete programs in
48 an interactive shell-like manner in your favoured programming
51 0.4.1 (13 December 1999)
52 * Series Expansion of Gamma function and some other trigonometric
53 functions at their poles works now.
54 * Many more evaluations of special functions at points where
56 * info_flags::rational doesn't return true for complex extensions
57 any more---use info_flags::crational for the old behaviour.
58 info_flags::integer and -::cinteger work similarly, the same
59 holds for types like info_flags::rational_polynomial.
61 0.4.0 (26 November 1999)
62 * First public release.