simplify_indexed() raises/lowers dummy indices to canonicalize their variance

[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.
+
+1.0.8 (31 March 2002)
+* Improvements in memory usage of the expand() methods.
+
+1.0.7 (18 March 2002)
+* Fixed LaTeX output of indexed and matrix objects.
+* Fixed matrix::pow(n) for n==0 and added helper functions to create unit
+  matrices "ex unit_matrix(unsigned, unsigned)".
+
+1.0.6 (4 March 2002)
+* "(x+1).subs(x==x-1)" now returns the correct result "x" instead of "x-1".
+
 1.0.5 (27 January 2002)
 * (l)degree(s), coeff(s, n) and collect(s) were extended to accept expressions
   of any class (except add/mul/ncmul/numeric) for "s". They should even work