This file records noteworthy changes.
+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() -> 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
less brain-dead ones and should now have much better performance.