proposition: Lemma lim_seriesN f : cvg (series f @ \oo) -> limn (series (- f)) = - limn (series f).
proof: Proof. by move=> cf; rewrite seriesN limN. 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