Theory Field

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theory Field
imports Factor PID

(*  Author: Clemens Ballarin, started 15 November 1997

Properties of abstract class field.
*)


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 (erule field_fact_prime)
done

end