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 *)
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15 set "baseuri" "cic:/matita/LAMBDA-TYPES/Unified/Inc/defs".
17 (* DISPLACEMENT INCREMENT RELATION
20 include "logic/equality.ma".
24 inductive Inc (i:Nat): Bool \to Head \to Nat \to Prop \def
25 | inc_bind: \forall x. Inc i true (bind x) (succ i)
26 | inc_flat: \forall y. Inc i true (flat y) i
27 | inc_neg : \forall z. Inc i false z i