Added entry explaining incompatibilities introduced by replacing sets by predicates.
(* Title: HOL/ZF/MainZF.thy
ID: $Id$
Author: Steven Obua
Starting point for using HOLZF.
See "Partizan Games in Isabelle/HOLZF", available from http://www4.in.tum.de/~obua/partizan
*)
theory MainZF
imports Zet LProd
begin
end