proposition: Lemma seriesSr n : series n.+1 = series n + u_ n.
proof: Proof. by rewrite !seriesEord/= big_ord_recr. Qed.
imports: mathcomp(all_ssreflect ssralg ssrint ssrnum matrix) mathcomp(interval rat) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(set_interval) reals ereal signed topology normedtype landau