- advances on lfxs for lfpxs

[helm.git] / matita / matita / contribs / lambdadelta / apps_2 / examples / ex_sta_ldec.ma

diff --git a/matita/matita/contribs/lambdadelta/apps_2/examples/ex_sta_ldec.ma b/matita/matita/contribs/lambdadelta/apps_2/examples/ex_sta_ldec.ma
new file mode 100644 (file)
index 0000000..2604304
--- /dev/null
+++ b/matita/matita/contribs/lambdadelta/apps_2/examples/ex_sta_ldec.ma
@@ -0,0 +1,23 @@
+(**************************************************************************)
+(*       ___                                                              *)
+(*      ||M||                                                             *)
+(*      ||A||       A project by Andrea Asperti                           *)
+(*      ||T||                                                             *)
+(*      ||I||       Developers:                                           *)
+(*      ||T||         The HELM team.                                      *)
+(*      ||A||         http://helm.cs.unibo.it                             *)
+(*      \   /                                                             *)
+(*       \ /        This file is distributed under the terms of the       *)
+(*        v         GNU General Public License Version 2                  *)
+(*                                                                        *)
+(**************************************************************************)
+
+include "basic_2/unfold/lstas.ma".
+
+(* EXAMPLES *****************************************************************)
+
+(* Static type assignment (iterated vs primitive): the declared variable ****)
+
+(* basic_1: we have "L.ⓛⓝ⋆k1.⋆k2⦄ ⊢ #0 • ⓝ⋆k1.⋆k2". *)
+theorem sta_ldec: ∀h,G,L,s1,s2. ⦃G, L.ⓛⓝ⋆s1.⋆s2⦄ ⊢ #0 •*[h, 1] ⋆s2.
+/3 width=6 by lstas_sort, lstas_succ, lstas_cast, drop_pair/ qed-.