matita/matita/contribs/lambdadelta/basic_1A/drop1/defs.ma

   1 (**************************************************************************)
   2 (*       ___                                                              *)
   3 (*      ||M||                                                             *)
   4 (*      ||A||       A project by Andrea Asperti                           *)
   5 (*      ||T||                                                             *)
   6 (*      ||I||       Developers:                                           *)
   7 (*      ||T||         The HELM team.                                      *)
   8 (*      ||A||         http://helm.cs.unibo.it                             *)
   9 (*      \   /                                                             *)
  10 (*       \ /        This file is distributed under the terms of the       *)
  11 (*        v         GNU General Public License Version 2                  *)
  12 (*                                                                        *)
  13 (**************************************************************************)
  14
  15 (* This file was automatically generated: do not edit *********************)
  16
  17 include "basic_1A/drop/defs.ma".
  18
  19 include "basic_1A/lift1/defs.ma".
  20
  21 inductive drop1: PList \to (C \to (C \to Prop)) \def
  22 | drop1_nil: \forall (c: C).(drop1 PNil c c)
  23 | drop1_cons: \forall (c1: C).(\forall (c2: C).(\forall (h: nat).(\forall (d:
  24 nat).((drop h d c1 c2) \to (\forall (c3: C).(\forall (hds: PList).((drop1 hds
  25 c2 c3) \to (drop1 (PCons h d hds) c1 c3)))))))).
  26
  27 rec definition ptrans (hds: PList) on hds: nat \to PList \def \lambda (i:
  28 nat).(match hds with [PNil \Rightarrow PNil | (PCons h d hds0) \Rightarrow
  29 (let j \def (trans hds0 i) in (let q \def (ptrans hds0 i) in (match (blt j d)
  30 with [true \Rightarrow (PCons h (minus d (S j)) q) | false \Rightarrow
  31 q])))]).
  32