proposition: Lemma fuscj_val n: Fuscj n 0 = fusc n.
proof: Proof. by rewrite /Fuscj/Fusci mul0n mul1n // addn0. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq choice fintype order bigop ssralg) mathcomp(div ssrnum ssrint rat prime path binomial) mathcomp(tuple finset) gaia(fibm)