proposition: Lemma cvgM f g a b : f @ F --> a -> g @ F --> b -> (f \* g) @ F --> a * b.
proof: Proof. exact: cvgZ. 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