Changes by: Alexei Kopylov (kopylov at cs.caltech.edu)
Date: 2006-06-02 13:58:32 -0700 (Fri, 02 Jun 2006)
Revision: 9245
Log message:

      Proved a lemma that is a partial case of transitivity (when Q=Top). 
      Some well-formedness assumption are probably redundant.