1 (**************************************************************************)
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 *)
13 (**************************************************************************)
15 include "delayed_updating/syntax/path_structure.ma".
16 include "delayed_updating/syntax/path_depth.ma".
18 (* STRUCTURE FOR PATH *******************************************************)
20 (* Constructions with depth *************************************************)
22 lemma depth_structure (p):
26 [ <structure_L_sn <depth_L_sn <depth_L_sn //
27 | <structure_A_sn <depth_A_sn <depth_A_sn //
28 | <structure_S_sn <depth_S_sn <depth_S_sn //