Changes by: Xin Yu (xiny at cs.caltech.edu)
Date: 2002-02-01 23:13:21 -0800 (Fri, 01 Feb 2002)
Revision: 3490
Log message:

      Added and proved complicated properties of subgroups.
      

Changes	Path
+37 -0	metaprl/theories/czf/czf_itt_subgroup.ml
+2 -0	metaprl/theories/czf/czf_itt_subgroup.mli
+1011 -173	metaprl/theories/czf/czf_itt_subgroup.prla