From Undecidability.L Require Import Tactics.Computable Lproc Lbeta ComputableTime mixedTactics.
(* *** Lrewrite: simplification with correctness statements*)
(* This module simplifies L-terms by rewriting with correctness-lemmatas form the hint library Lrewrite *)
(* For Time Complexity: *)

Lemma pow_app_helper s s' t t' u:
s >* s' -> t >* t' -> s' t' >* u -> s t >* u.