proposition: Lemma Stern_odd n: Stern (n.*2.+1) = Sba_p (Stern n).
proof: Proof. rewrite /Stern /Sba_p /= - doubleS fusc_even fusc_odd ratN_D addf_div1 //. by rewrite pnatr_eq0 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)