proposition: Lemma cvgMr g a b : g @ F --> b -> (a * g x) @[x --> F] --> a * b.
proof: Proof. exact: cvgZr. 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