fact: Definition isTopologicalSpace (X : hSet) := ∑ O : (X → hProp) → hProp, isSetOfOpen O.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.Topology.Filters UniMath.Algebra.Groups UniMath.Algebra.DivisionRig UniMath.Algebra.ConstructiveStructures