proposition: Lemma fusciL_even l a b: FusciL (false::l) a b = FusciL l (a + b) b.
proof: Proof. by rewrite /FusciL /= fusci_even. 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)