proposition: Lemma pow2_ne_zero: forall n, pow2 n <> 0.
proof: Proof. intros. pose proof (zero_lt_pow2 n). lia. 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