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 nodes_preserved_bs_bool_fun_1 :
forall (bs1 bs2 : BDDstate) (n : nat) (node : ad),
n = nat_of_N (bs_node_height bs1 node) ->
BDDstate_OK bs1 ->
BDDstate_OK bs2 ->
nodes_preserved_bs bs1 bs2 ->
node_OK bs1 node ->
bool_fun_eq (bool_fun_of_BDD_bs bs2 node) (bool_fun_of_BDD_bs bs1 node).