(*
Properties of abstract class field
$Id: Field.thy,v 1.3 2005/09/17 18:49:14 wenzelm Exp $
Author: Clemens Ballarin, started 15 November 1997
*)
theory Field imports Factor PID begin
instance field < "domain"
apply intro_classes
apply (rule field_one_not_zero)
apply (erule field_integral)
done
instance field < factorial
apply intro_classes
apply (rule TrueI)
apply (erule field_fact_prime)
done
end