Section BDDmu_ex_results.
Variable gc : BDDconfig -> list ad -> BDDconfig.
Hypothesis gc_is_OK : gc_OK gc.
Variable cfg : BDDconfig.
Variable ul : list ad.
Variable nodet nodeg : ad.
Hypothesis cfg_OK : BDDconfig_OK cfg.
Hypothesis ul_OK : used_list_OK cfg ul.
Hypothesis usedt : used_node' cfg ul nodet.
Hypothesis usedg : used_node' cfg ul nodeg.

Lemma BDDmu_ex_used_nodes_preserved :
used_nodes_preserved cfg (fst (BDDmu_ex gc cfg ul nodet nodeg)) ul.