X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=NEWS;h=af7ec2202cb0764b49703ca437aea3fa6b13e996;hp=60ae0667a33b083eb58e5845bc39ae937aa7324e;hb=f1637dceefe0fbf79308958f8bc28dedd38aab85;hpb=0481215b4a7e4b6585033c98d52ce1e7e53fe954

diff --git a/NEWS b/NEWS
index 60ae0667..af7ec220 100644
--- a/NEWS
+++ b/NEWS
@@ -1,7 +1,36 @@
 This file records noteworthy changes.
 
-0.8.3 (<date>)
-* Fix some build-problems (with recent libreadline).
+0.9.0 (<date>)
+* In the output and in ginsh, lists are now delimited by { } braces, and
+  matrices are delimited by single [ ] brackets.
+* simplify_indexed() renames dummy indices so, e.g., "a.i*a.i+a.j*a.j" gets
+  simplified to "2*a.i*a.i".
+* New functions/methods:
+   - canonicalize_clifford() (helpful when comparing expressions containing
+     Dirac matrices)
+   - symmetrize() and antisymmetrize()
+   - numer_denom() (return numerator and denominator)
+   - map() (apply function to subexpressions)
+   - evalm() (evaluate sums and products of matrices)
+* Added a new function match() for performing pattern matching. subs() and
+  has() also accept patterns as arguments. A pattern can be any expression,
+  optionally containing wildcard objects. These are constructed with the
+  call "wild(<unsigned>)" and are denoted as "$0", "$1" etc. in the output
+  and in ginsh.
+* Fixed possible crash when calling subs() on expressions with non-commutative
+  products.
+* Positive integer powers of non-commutative expressions are automatically
+  expanded.
+* Several little bugfixes.
+
+0.8.3 (11 May 2001)
+* color and clifford classes are functional and documented.
+* New "spinidx" class for dotted/undotted indices.
+* Predefined spinor metric tensor (created by spinor_metric()).
+* Symbols can have a LaTeX name, e.g. symbol s("s", "\\sigma");
+* LaTeX output of indexed objects is much nicer.
+* Fixed some build problems (with recent libreadline).
+* Semantics of arithmetic operators now follows the C++ rules more strictly.
 
 0.8.2 (24 April 2001)
 * degree(), ldegree(), coeff(), lcoeff(), tcoeff() and collect() work with