proposition: Lemma lim_seriesD f g : cvgn (series f) -> cvgn (series g) -> limn (series (f + g)) = limn (series f) + limn (series g).
proof: Proof. by move=> cf cg; rewrite seriesD limD. 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