proposition: Lemma seriesS n : series n.+1 = u_ n + series n.
proof: Proof. by rewrite addrC seriesSr. 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