Changes by: Jason Hickey (jyh at cs.caltech.edu)
Date: 2006-01-22 16:28:02 -0800 (Sun, 22 Jan 2006)
Revision: 8569
Log message:

      Added intro and elim rules for BindTriangle{n}.
      Reproved all the theorems in Itt_hoas_sequent_bterm2.