proposition: Lemma __deprecated__ereal_is_cvgD (R : realFieldType) (u v : (\bar R)^nat) : limn u +? limn v -> cvgn u -> cvgn v -> cvgn (u \+ v).
proof: Proof. exact: is_cvgeD. 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