proposition: Lemma fusc_gt0 n: (0 < fusc n) = (0 < n).
proof: Proof. by rewrite !lt0n fusc_eq0. 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)