X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=NEWS;h=4a119ee677fedc7a484c607103f3db4d2a4e4e32;hp=699284cc2b10ab6d4874348c3b439232a4ef7505;hb=db5765dc91202851739e196ba11bfccb0b3fe7bc;hpb=6a0b4545189926492f657b201e3ed1b9de1dd897
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This file records noteworthy changes.
-0.6.0 (...)
+0.6.4 (10 August 2000)
+* Complete revamp of methods in class matrix. Some redundant (and poor)
+ implementations of elimination schemes were thrown out. The code is now
+ highly orthogonal, more flexible and much more efficient.
+* Some long standing and quite nasty bugs were discovered and fixed in the
+ following functions: add::normal(), heur_gcd(), sr_gcd() and Order_eval().
+
+0.6.3 (25 July 2000)
+* Derivatives are now assembled in a slightly different manner (i.e. they
+ might 'look' different on first sight). Under certain circumstances this
+ can result in a dramatic speedup because it gives hashing a better chance,
+ especially when computing higher derivatives.
+* Some series expansions of built-in functions have been reengineered.
+* The algorithm for computing determinants can be chosen by the user. See
+ ginac/flags.h and ginac/matrix.h.
+* The Dilogarithm (Li2) now has floating point evaluation, derivative and a
+ proper series expansion.
+* Namespace 'std' cleanly disentangled, as demanded by ISO/EIC 14882-1998(E).
+* Some minor bugfixes, one major lsolve()-bugfix and documentation updates.
+
+0.6.2 (21 June 2000)
+* ginaccint.bin is now launched by a binary program instead of by a scripts.
+ This allows us to write #!-scripts. A small test suite for GiNaC-cint was
+ added.
+* Several minor bugfixes.
+
+0.6.1 (18 May 2000)
+* Cleanup in the interface to Cint. The required version is now Cint 5.14.38.
+* Several bugfixes in target install.
+
+0.6.0 (11 May 2000)
* IMPORTANT: Several interface changes make programs written with GiNaC
much clearer but break compatibility with older versions:
- f(x).series(x,p[,o]) -> f(x).series(x==p,o)
- series(f(x),x,p[,o]) -> series(f(x),x==p,o)
- - gamma() -> Gamma()
- - EulerGamma -> gamma
- - beta() -> Beta()
+ - gamma() -> tgamma() (The true Gamma function, there is now also
+ log(tgamma()), called lgamma(), in accord with ISO/IEC 9899:1999.)
+ - EulerGamma -> Euler
* #include'ing ginac.h defines the preprocessor symbols GINACLIB_MAJOR_VERSION,
GINACLIB_MINOR_VERSION, and GINACLIB_MICRO_VERSION with the respective GiNaC
library version numbers.
+* Expressions can be constructed from strings like this:
+ ex e("2*x+y", lst(x, y));
+* ex::to_rational() provides a way to extend the domain of functions like
+ gcd() and divide() that only work on polynomials or rational functions (the
+ good old ex::subs() method reverses this process)
+* Calling diff() on a function that has no derivative defined returns the
+ inert derivative function "Derivative".
+* Several new timings in the check target. Some of them may be rather rude
+ at your machine, feel free to interrupt them.
0.5.4 (15 March 2000)
* Some algorithms in class matrix (notably determinant) were replaced by