proposition: Remark copy_trans_sigma_dec : sigma_ctrl_dec s0 (bm (copy_trans c0 s1 s2)) = sigma_ctrl_dec s0 (bm c0).
proof: Proof. intros; unfold sigma_ctrl_dec in |- *. apply sigma_simpl; intros; apply copy_trans_ctrl_dec. Qed.
imports: init table_act mess_act