fact: Fixpoint sternD (u v n : nat) := if n is k.+1 then sternd_rec (sternD u v k) else [:: u; v].
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)