proposition: Lemma here2 : change_x0y0 x0 y0 = z0.
proof: Proof. intros; unfold change_x0y0 in |- *; simpl in |- *. rewrite (here E (F -> G) eq_E_dec t x0 (change_x0 F G eq_F_dec (t x0) y0 z0)) . rewrite here; auto. Qed.
imports: table