proposition: Lemma fuscN_prop n: fusc n = (fuscN2 (bin_of_nat n)).1.
proof: Proof. by rewrite fuscN2_prop. 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)