Section Components.
Variable cfg : BDDconfig.
Hypothesis cfg_OK : BDDconfig_OK cfg.
Definition bs_of_cfg := fst cfg.
Definition share_of_cfg := fst (snd cfg).
Definition fl_of_cfg := fst (snd (snd cfg)).
Definition cnt_of_cfg := fst (snd (snd (snd cfg))).
Definition negm_of_cfg := fst (snd (snd (snd (snd cfg)))).
Definition orm_of_cfg := fst (snd (snd (snd (snd (snd cfg))))).
Definition um_of_cfg := snd (snd (snd (snd (snd (snd cfg))))).

Lemma BDDunique_1 :
forall (bs : BDDstate) (share : BDDsharing_map),
BDDstate_OK bs ->
BDDsharing_OK bs share ->
forall (n : nat) (node1 node2 : ad),
n =
max (nat_of_N (bs_node_height bs node1))
(nat_of_N (bs_node_height bs node2)) ->
node_OK bs node1 ->
node_OK bs node2 ->
bool_fun_eq (bool_fun_of_BDD_bs bs node1) (bool_fun_of_BDD_bs bs node2) ->
node1 = node2.