fact: Fixpoint Npow2 (n : nat) : N := match n with | O => 1 | S n' => 2 * Npow2 n' end%N.
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