This file records noteworthy changes.
-0.8.3 (<date>)
+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.
-* Fix some build-problems (with recent libreadline).
+* 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