fact: Definition ex_filter_lim {T : TopologicalSpace} (F : Filter T) := ∃ (x : T), is_filter_lim F x.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.Topology.Filters UniMath.Algebra.Groups UniMath.Algebra.DivisionRig UniMath.Algebra.ConstructiveStructures