proposition: Theorem pow2_N : forall n, Npow2 n = N.of_nat (pow2 n).
proof: Proof. intro n. apply nat_of_N_eq. rewrite Nat2N.id. apply Npow2_nat. Qed.
imports: Coq.Classes.Morphisms Coq.Classes.Morphisms_Prop Coq.Bool.Bool Coq.Arith.Arith Coq.micromega.Lia Coq.NArith.NArith Coq.ZArith.ZArith bbv.N_Z_nat_conversions bbv.Nomega