1 This file records noteworthy changes.
4 * ginaccint.bin is now launched by a binary program instead of by a scripts.
5 This allows us to write #!-scripts. A small test suite for GiNaC-cint was
7 * Several minor bugfixes.
10 * Cleanup in the interface to Cint. The required version is now Cint 5.14.38.
11 * Several bugfixes in target install.
14 * IMPORTANT: Several interface changes make programs written with GiNaC
15 much clearer but break compatibility with older versions:
16 - f(x).series(x,p[,o]) -> f(x).series(x==p,o)
17 - series(f(x),x,p[,o]) -> series(f(x),x==p,o)
18 - gamma() -> tgamma() (The true Gamma function, there is now also
19 log(tgamma()), called lgamma(), in accord with ISO/IEC 9899:1999.)
21 * #include'ing ginac.h defines the preprocessor symbols GINACLIB_MAJOR_VERSION,
22 GINACLIB_MINOR_VERSION, and GINACLIB_MICRO_VERSION with the respective GiNaC
23 library version numbers.
24 * Expressions can be constructed from strings like this:
25 ex e("2*x+y", lst(x, y));
26 * ex::to_rational() provides a way to extend the domain of functions like
27 gcd() and divide() that only work on polynomials or rational functions (the
28 good old ex::subs() method reverses this process)
29 * Calling diff() on a function that has no derivative defined returns the
30 inert derivative function "Derivative".
31 * Several new timings in the check target. Some of them may be rather rude
32 at your machine, feel free to interrupt them.
35 * Some algorithms in class matrix (notably determinant) were replaced by
36 less brain-dead ones and should now have much better performance.
37 * Checks were completely reorganized and split up into three parts:
38 a) exams (small regression tests with predefined input)
39 b) checks (lenghty coherence checks with random input)
40 c) timings (for coherence and crude benchmarking)
41 * Behaviour of .evalf() was changed: it doesn't .evalf() any exponents.
42 * Expanded expressions now remember they are expanded to prevent
43 superfluous expansions.
44 * Small bugfixes and improvements in the series expansion.
46 0.5.3 (23 February 2000)
47 * A more flexible scheme for registering functions was implemented,
48 allowing for remembering, too.
51 0.5.2 (16 February 2000)
52 * Mainly fixes a bug in the packaging of release 0.5.1.
54 0.5.1 (14 February 2000)
55 * Fixes a small number of bugs.
57 0.5.0 (7 February 2000)
58 * Expressions can be written ("archived") to files and read therefrom.
59 * Addition of GiNaC-cint, which lets you write complete programs in
60 an interactive shell-like manner in your favoured programming
63 0.4.1 (13 December 1999)
64 * Series Expansion of Gamma function and some other trigonometric
65 functions at their poles works now.
66 * Many more evaluations of special functions at points where
68 * info_flags::rational doesn't return true for complex extensions
69 any more---use info_flags::crational for the old behaviour.
70 info_flags::integer and -::cinteger work similarly, the same
71 holds for types like info_flags::rational_polynomial.
73 0.4.0 (26 November 1999)
74 * First public release.