proposition: Lemma fusciL_odd l a b: FusciL (true::l) a b = FusciL l a (a + b).
proof: Proof. by rewrite /FusciL /= fusci_odd. 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)