fact: Definition bool_fun_independent (bf : bool_fun) (x : BDDvar) := forall vb : var_binding, bool_fun_eval bf (augment vb x true) = bool_fun_eval bf (augment vb x false).
imports: Bool Sumbool Arith ZArith NArith Nnat Ndec Ndigits IntMap(Allmaps) Wf_nat BDDvar_ad_nat bdd1 bdd2