X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=NEWS;h=b247fd55d5f840448c62638605dd6fe6d2819083;hp=601e575496282a7251cf6da9be8a4240d4017aa2;hb=6f0f98bfdbe19376536f058f41309e2fcd87df57;hpb=f4ea690a3f118bf364190f0ef3c3f6d2ccdf6206

diff --git a/NEWS b/NEWS
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+++ b/NEWS
@@ -1,12 +1,41 @@
 This file records noteworthy changes.
 
-0.5.4 (?? 2000)
-* Algorithms in class matrix (determinant and solve) were replaced by
+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.
-* Checks were reorganized and split up into three parts:
-  a) exams (small tests with predefined input)
-  b) checks (lenghty consistency checks)
-  c) timings (for crude benchmarking)
+* Checks were completely reorganized and split up into three parts:
+  a) exams (small regression tests with predefined input)
+  b) checks (lenghty coherence checks with random input)
+  c) timings (for coherence and crude benchmarking)
+* Behaviour of .evalf() was changed: it doesn't .evalf() any exponents.
+* Expanded expressions now remember they are expanded to prevent
+  superfluous expansions.
+* Small bugfixes and improvements in the series expansion.
 
 0.5.3 (23 February 2000)
 * A more flexible scheme for registering functions was implemented,