proposition: Lemma isaprop_topologyfromneighborhood : ∏ A, isaprop (topologyfromneighborhood A).
proof: Proof. intros A. apply impred_isaprop ; intros x ; apply isapropimpl, propproperty. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.Topology.Filters UniMath.Algebra.Groups UniMath.Algebra.DivisionRig UniMath.Algebra.ConstructiveStructures