proposition: Lemma cvgD f g a b : f @ F --> a -> g @ F --> b -> (f + g) @ F --> a + b.
proof: Proof. by move=> ? ?; apply: continuous2_cvg => //; apply add_continuous. Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg ssrint ssrnum finmap matrix) mathcomp(rat interval zmodp vector fieldext falgebra) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(cardinality set_interval Rstruct) ereal reals signed topology prodnormedzmodule