proposition: Lemma Stern_consecutive_coprime1 a b : Stern_consecutive a b -> coprime a b.
proof: Proof. by move =>[n [i [ ha <- <-]]]; rewrite /coprime sternD_gcd_rec2. 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)