fixed a bug in the raising/lowering of dummy indices and extended it to work

[ginac.git] / NEWS

diff --git a/NEWS b/NEWS
index 67f36b9970b3c6ae4a6b051f90c6508a57f3b9a6..36a5412d455166544ae65517f556dfb5e5cac3f7 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -3,7 +3,7 @@ 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,
 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.
+  like eps~a.b~c~d*X.a*X~b -> 0 and X.a~a-X~a.a -> 0.

 
 1.0.8 (31 March 2002)
 * Improvements in memory usage of the expand() methods.
 
 1.0.8 (31 March 2002)
 * Improvements in memory usage of the expand() methods.