proposition: Lemma sternD_sum_lin a b a' b' n : (sternD_sum a b n) +(sternD_sum a' b' n) = sternD_sum (a+a') (b+b') n.
proof: Proof. by rewrite !sternD_sumE -mulnDr addnACA. 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)