src/ZF/Ord.thy
author clasohm
Thu Sep 16 12:20:38 1993 +0200 (1993-09-16)
changeset 0 a5a9c433f639
child 30 d49df4181f0d
permissions -rw-r--r--
Initial revision
     1 (*  Title: 	ZF/ordinal.thy
     2     ID:         $Id$
     3     Author: 	Lawrence C Paulson, Cambridge University Computer Laboratory
     4     Copyright   1992  University of Cambridge
     5 
     6 Ordinals in Zermelo-Fraenkel Set Theory 
     7 *)
     8 
     9 Ord = WF +
    10 consts
    11     Memrel      	::      "i=>i"
    12     Transset,Ord        ::      "i=>o"
    13 
    14 rules
    15   Memrel_def  	"Memrel(A)   == {z: A*A . EX x y. z=<x,y> & x:y }"
    16   Transset_def	"Transset(i) == ALL x:i. x<=i"
    17   Ord_def     	"Ord(i)      == Transset(i) & (ALL x:i. Transset(x))"
    18 
    19 end