replaced Pure/Syntax/symbol_font.ML by Pure/Syntax/symbol.ML;
added Pure/Syntax/scan.ML;
(* Title: ZF/Cardinal_AC.thy
ID: $Id$
Author: Lawrence C Paulson, Cambridge University Computer Laboratory
Copyright 1994 University of Cambridge
Cardinal Arithmetic WITH the Axiom of Choice
*)
Cardinal_AC = CardinalArith + Zorn