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 * Calling diff() on a function that has no derivative defined returns the
20 inert derivative function "Derivative".
21 * Several new timings in the check target. Some of them may be rather rude
22 at your machine, feel free to interrupt them.
25 * Some algorithms in class matrix (notably determinant) were replaced by
26 less brain-dead ones and should now have much better performance.
27 * Checks were completely reorganized and split up into three parts:
28 a) exams (small regression tests with predefined input)
29 b) checks (lenghty coherence checks with random input)
30 c) timings (for coherence and crude benchmarking)
31 * Behaviour of .evalf() was changed: it doesn't .evalf() any exponents.
32 * Expanded expressions now remember they are expanded to prevent
33 superfluous expansions.
34 * Small bugfixes and improvements in the series expansion.
36 0.5.3 (23 February 2000)
37 * A more flexible scheme for registering functions was implemented,
38 allowing for remembering, too.
41 0.5.2 (16 February 2000)
42 * Mainly fixes a bug in the packaging of release 0.5.1.
44 0.5.1 (14 February 2000)
45 * Fixes a small number of bugs.
47 0.5.0 (7 February 2000)
48 * Expressions can be written ("archived") to files and read therefrom.
49 * Addition of GiNaC-cint, which lets you write complete programs in
50 an interactive shell-like manner in your favoured programming
53 0.4.1 (13 December 1999)
54 * Series Expansion of Gamma function and some other trigonometric
55 functions at their poles works now.
56 * Many more evaluations of special functions at points where
58 * info_flags::rational doesn't return true for complex extensions
59 any more---use info_flags::crational for the old behaviour.
60 info_flags::integer and -::cinteger work similarly, the same
61 holds for types like info_flags::rational_polynomial.
63 0.4.0 (26 November 1999)
64 * First public release.