proposition: Lemma cvg_entourage {F} {FF : Filter F} (y : M) : F --> y -> forall A, entourage A -> \forall y' \near F, A (y,y').
proof: Proof. by move/cvg_entourageP. Qed.
imports: HB(structures) mathcomp(all_ssreflect all_algebra finmap generic_quotient) mathcomp(boolp classical_sets functions) mathcomp(cardinality mathcomp_extra fsbigop) reals signed