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.ma".
16 include "delayed_updating/notation/functions/circled_times_1.ma".
18 (* STRUCTURE FOR PATH *******************************************************)
20 rec definition path_structure (p) on p β
25 [ label_node_d n β path_structure q
26 | label_edge_L β πβpath_structure q
27 | label_edge_A β πβpath_structure q
28 | label_edge_S β π¦βpath_structure q
34 'CircledTimes p = (path_structure p).