helm/software/matita/contribs/LAMBDA-TYPES/Level-1/problems.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 (* Problematic objects for disambiguation/typechecking ********************)
  16
  17 set "baseuri" "cic:/matita/LAMBDA-TYPES/Level-1/problems".
  18
  19 include "LambdaDelta/theory.ma".
  20
  21 (* Problem 1: disambiguation errors with these objects *)
  22
  23 (*  iso_trans (in problems-1)
  24  *  drop1_getl_trans (in problems-2)
  25  *)
  26
  27 (* Problem 2: assertion failure raised by type checker on this object *)
  28
  29 inductive tau1 (g:G) (c:C) (t1:T): T \to Prop \def
  30 | tau1_tau0: \forall (t2: T).((tau0 g c t1 t2) \to (tau1 g c t1 t2))
  31 | tau1_sing: \forall (t: T).((tau1 g c t1 t) \to (\forall (t2: T).((tau0 g c
  32 t t2) \to (tau1 g c t1 t2)))).