src/ZF/Constructible/ROOT.ML

simplified definition of open_extreal

(*  Title:      ZF/Constructible/ROOT.ML
    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
    Copyright   2002  University of Cambridge

Inner Models, Absoluteness and Consistency Proofs.
*)

use_thys ["DPow_absolute", "AC_in_L", "Rank_Separation"];