proposition: Lemma cvgrPdist_le {T} {F : set_system T} {FF : Filter F} (f : T -> V) (y : V) : f @ F --> y <-> forall eps, 0 < eps -> \forall t \near F, `|y - f t| <= eps.
proof: Proof. exact: (cvgrP _ 0 1)%N. 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