(* * Copyright (c) 2009 Robert Dockins and Aquinas Hobor. * *)
(* Coq development: using indirection theory to model types in l-calculus *)
(* lam_ref_mach_lemmas.v: various boring lemmas about the machine *)
(* COERCIONS *)
(* DECIDABILTY *)
(* SUBSTITUTION *)
(* STEP RELATION *)

Lemma stopped_Update: forall m e1 e2 e3,
stopped m (Update e1 e2 e3) ->
stopped m e1 \/ (isValue e1 /\ stopped m e2).