documentation update

diff --git a/NEWS b/NEWS
index 962876eda07a88fa400a13ae6d03de2b7e96bbb1..d5d29512a9ccdf74aaebe4d2f1eca3860781982a 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,18 +1,26 @@
 This file records noteworthy changes.
 
 0.8.4 (<date>)
 This file records noteworthy changes.
 
 0.8.4 (<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".
 * simplify_indexed() renames dummy indices so, e.g., "a.i*a.i+a.j*a.j" gets
   simplified to "2*a.i*a.i".

-* Added canonicalize_clifford() function that can be helpful when comparing
-  expressions containing Dirac matrices.
+* 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.
 * 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.

-* Added symmetrize(), antisymmetrize() and numer_denom() functions.

 * Fixed possible crash when calling subs() on expressions with non-commutative
   products.
 * Fixed possible crash when calling subs() on expressions with non-commutative
   products.

+* Positive integer powers of non-commutative expressions are automatically
+  expanded.

 
 0.8.3 (11 May 2001)
 * color and clifford classes are functional and documented.
 
 0.8.3 (11 May 2001)
 * color and clifford classes are functional and documented.