documentation update

[ginac.git] / NEWS

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 This file records noteworthy changes.
 
+1.0.9 (<date>)
+* simplify_indexed() now raises/lowers dummy indices to canonicalize the index
+  variance. This allows some simplifications that weren't possible before,
+  like eps~a.b~c~d*X.a*X~b -> 0 and X.a~a-X~a.a -> 0.
+* Implemented relational::subs().
+* Fixed bug in simplify_ncmul() for clifford objects.
+
 1.0.8 (31 March 2002)
 * Improvements in memory usage of the expand() methods.