Changes by: Xin Yu (xiny at cs.caltech.edu)
Date: 2003-04-11 01:02:31 -0700 (Fri, 11 Apr 2003)
Revision: 4411
Log message:

      Defined group isomorphism and did a little adjustment to the def. of group homomorphism.
      

Changes	Path
+19 -0	metaprl/theories/itt/itt_comment.ml
+2 -0	metaprl/theories/itt/itt_comment.mli
+101 -17	metaprl/theories/itt/itt_group.ml
+8 -0	metaprl/theories/itt/itt_group.mli
+6133 -4801	metaprl/theories/itt/itt_group.prla
+2 -2	metaprl/theories/itt/itt_grouplikeobj.ml