--- /dev/null
+(**************************************************************************)
+(* ___ *)
+(* ||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 *)
+(* *)
+(**************************************************************************)
+
+(* ********************************************************************** *)
+(* Progetto FreeScale *)
+(* *)
+(* Sviluppato da: Ing. Cosimo Oliboni, oliboni@cs.unibo.it *)
+(* Sviluppo: 2008-2010 *)
+(* *)
+(* ********************************************************************** *)
+
+include "num/word16.ma".
+include "num/byte8_lemmas.ma".
+
+(* **** *)
+(* WORD *)
+(* **** *)
+
+ndefinition word16_destruct_1 ≝ cn_destruct_1 word16.
+ndefinition word16_destruct_2 ≝ cn_destruct_2 word16.
+
+ndefinition symmetric_eqw16 ≝ symmetric_eqcn ? eq_b8 symmetric_eqb8.
+
+ndefinition eqw16_to_eq ≝ eqcn_to_eq ? eq_b8 eqb8_to_eq.
+ndefinition eq_to_eqw16 ≝ eq_to_eqcn ? eq_b8 eq_to_eqb8.
+
+ndefinition decidable_w16 ≝ decidable_cn ? decidable_b8.
+
+ndefinition neqw16_to_neq ≝ neqcn_to_neq ? eq_b8 neqb8_to_neq.
+ndefinition neq_to_neqw16 ≝ neq_to_neqcn ? eq_b8 neq_to_neqb8 decidable_b8.