Changes by: Alexei Kopylov (kopylov at cs.caltech.edu)
Date: 2003-11-06 16:39:54 -0800 (Thu, 06 Nov 2003)
Revision: 5077
Log message:
1. Added a theory of nequal:
'a <> 'b in 'T <--> not{'a='b in 'T}
2. Fix a bug in itt_equal.
3. Add renaming for ordered structure (reverse_order).