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4 (* ||A|| A project by Andrea Asperti *)
6 (* ||I|| Developers: *)
7 (* ||T|| The HELM team. *)
8 (* ||A|| http://helm.cs.unibo.it *)
10 (* \ / This file is distributed under the terms of the *)
11 (* v GNU General Public License Version 2 *)
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15 include "delayed_updating/syntax/prototerm_proper.ma".
16 include "delayed_updating/syntax/path_inner_proper.ma".
17 include "ground/lib/subset_overlap.ma".
19 (* PROPER CONDITION FOR PROTOTERM *******************************************)
21 (* Constructions with inner condition for prototerm *************************)
23 lemma term_proper_outer (t):
24 t β§Έβ¬ π β t Ο΅ π.
25 /4 width=3 by path_des_outer_proper, subset_ol_i/