proposition: Lemma Zeck_2 : Zeck 2 = [:: 1].
proof: Proof. exact: (Zeck_fib 1). Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq path fintype div bigop binomial) mathcomp(prime finset ssralg ssrnum ssrint)