proposition: Lemma Zeckv_nil : Zeck_val nil = 0.
proof: Proof. by rewrite /Zeck_val big_nil. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq path fintype div bigop binomial) mathcomp(prime finset ssralg ssrnum ssrint)