src/HOL/Subst/Setplus.thy
author nipkow
Mon Oct 21 09:50:50 1996 +0200 (1996-10-21)
changeset 2115 9709f9188549
parent 1476 608483c2122a
permissions -rw-r--r--
Added trans_tac (see Provers/nat_transitive.ML)
     1 (*  Title:      Substitutions/setplus.thy
     2     Author:     Martin Coen, Cambridge University Computer Laboratory
     3     Copyright   1993  University of Cambridge
     4 
     5 Minor additions to HOL's set theory
     6 *)
     7 
     8 Setplus = Set + 
     9 
    10 rules
    11 
    12   ssubset_def    "A < B == A <= B & ~ A=B"
    13 
    14 end