proposition: Lemma Zpower_n: 0 < 2 ^ [|n|].
proof: Proof. apply Zpower_gt_0; auto with zarith. case (ZnZ.spec_to_Z n); auto with zarith. Qed.
imports: Bignums(DoubleBase DoubleSub DoubleMul DoubleSqrt DoubleLift DoubleDivn1 DoubleDiv) Bignums(DoubleCyclic BigN) CyclicAxioms Cyclic63 ZArith ZCAux