proposition: Lemma filter_from_entourageE {M : uniformType} x : filter_from (@entourage M) (fun A => to_set A x) = nbhs x.
proof: Proof. by rewrite -nbhs_entourageE. Qed.
imports: HB(structures) mathcomp(all_ssreflect all_algebra finmap generic_quotient) mathcomp(boolp classical_sets functions) mathcomp(cardinality mathcomp_extra fsbigop) reals signed