Changes by: Xin Yu (xiny at cs.caltech.edu)
Date: 2005-03-10 23:49:48 -0800 (Thu, 10 Mar 2005)
Revision: 6896
Log message:

      Fixed proofs of add_vars_upto and finished proofs of make_depth.
      
      Note: The definition of last_var is invalid for a 0-depth non-var bterm. Alexei,
      is this what you really want?
      

Changes	Path
+2 -0	metaprl/theories/itt/itt_synt_subst.ml
+3732 -1530	metaprl/theories/itt/itt_synt_subst.prla