documentation update

[ginac.git] / NEWS

diff --git a/NEWS b/NEWS
index 14306999cc55bcbf4bf728bf2052e2ea1c5197d3..d349c8fa083a54009dd58c74d4e63fbeff38f5c8 100644 (file)
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@@ -1,9 +1,21 @@
 This file records noteworthy changes.
 
-0.8.3 (<date>)
+0.8.4 (<date>)
+* 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.
+* Fixed possible crash when calling subs() on expressions with non-commutative
+  products.
+
+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).
+* 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