ZF/Finite: added the finite function space, A-||>B
ZF/InfDatatype: added rules for the above
(* Title: ZF/Finite.thy
ID: $Id$
Author: Lawrence C Paulson, Cambridge University Computer Laboratory
Copyright 1994 University of Cambridge
Finite powerset operator
*)
Finite = Arith +
consts
Fin :: "i=>i"
FiniteFun :: "[i,i]=>i" ("(_ -||>/ _)" [61, 60] 60)
inductive
domains "Fin(A)" <= "Pow(A)"
intrs
emptyI "0 : Fin(A)"
consI "[| a: A; b: Fin(A) |] ==> cons(a,b) : Fin(A)"
type_intrs "[empty_subsetI, cons_subsetI, PowI]"
type_elims "[make_elim PowD]"
inductive
domains "FiniteFun(A,B)" <= "Fin(A*B)"
intrs
emptyI "0 : A -||> B"
consI "[| a: A; b: B; h: A -||> B; a ~: domain(h) \
\ |] ==> cons(<a,b>,h) : A -||> B"
type_intrs "Fin.intrs"
end