documentation update (Clifford algebra)

[ginac.git] / NEWS

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 This file records noteworthy changes.
 
+1.0.13 (<date>)
+* Contracting epsilon tensors with Euclidean indices now works.
+* Improved dummy index symmetrization in sums.
+* Added dirac_gammaL/R(), which can be used instead of dirac_gamma6/7()
+  but are single objects, to allow for a more compact notation of Dirac
+  strings.
+
 1.0.12 (30 October 2002)
-* Fixed a bug in power::expand() that could produce invalid exressions.
+* Fixed a bug in power::expand() that could produce invalid expressions.
 * The input parser no longer ignores extra data following accepted input.
 * Improved the CLN C-source output (integers are printed as integers, and
   floating point numbers include the precision).