Remark del_trans_xi : forall s0 : Site, xi (delete_trans c0 s1) s0 = xi c0 s0.Remark del_trans_yi : forall s0 : Site, yi (delete_trans c0 s1) s0 = yi c0 s0.

(* Specifications: *)
Lemma del_trans_sigma_xi : sigma_xi (delete_trans c0 s1) = sigma_xi c0.
Lemma del_trans_sigma_yi : sigma_yi (delete_trans c0 s1) = sigma_yi c0.
Lemma del_trans_D : (rt c0 s0 = false -> D_queue (bm c0 s0 owner)) -> rt (delete_trans c0 s1) s0 = false -> D_queue (bm (delete_trans c0 s1) s0 owner).
Lemma del_trans_alt : alternate (bm c0 s0 owner) -> alternate (bm (delete_trans c0 s1) s0 owner).