finalized 1.0.13

[ginac.git] / NEWS

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 This file records noteworthy changes.
 
-1.0.13 (<date>)
+1.0.13 (27 January 2003)
 * 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.
+* Powers with negative numeric exponents are printed as fractions in the
+  LaTeX output.
+* Added symbolic_matrix() for the convenient creation of matrices filled
+  with symbols.
+* Added collect_common_factors() which collects common factors from the
+  terms of sums.
+* simplify_indexed() converts "gamma~mu*p.mu" to "p\".
 
 1.0.12 (30 October 2002)
 * Fixed a bug in power::expand() that could produce invalid expressions.