Added new pseries exam

[ginac.git] / NEWS

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 This file records noteworthy changes.
 
-1.2.2 (<date>)
+1.2.3 (<date>)
+* Added variants of dirac_trace() and color_trace() that take the trace over
+  more than one representation label by specifying a set or list of labels.
+* diracgamma::contract_with() uses Chisholm identities in 4 dimensions to
+  produce more compact results.
+
+1.2.2 (3 August 2004)
 * Added const_preorder_iterator and const_postorder_iterator classes (and
   associated methods ex::pre/postorder_begin/end()) providing tree traversal
   with iterators.