From Undecidability.L Require Import Util.L_facts.
From Undecidability.L.Tactics Require Import Lproc Reflection.
(* *** Lbeta: symbolic beta reduction *)
(* This module procides tactics to simlify L-term w.r.t beta reduction in L. It does so by the reflective tactic simplify_L' using the module Reflextion. *)

Lemma eval_helper s t u: s >* u -> eval u t -> eval s t.