proposition: Lemma is_cvg_seriesN f : cvgn (series (- f)) = cvgn (series f).
proof: Proof. by rewrite seriesN is_cvgNE. 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