fact: Definition KH_fine (a b : R) := within (fun ptd => pointed_subdiv ptd /\ SF_h ptd = Rmin a b /\ last (SF_h ptd) (SF_lx ptd) = Rmax a b) KH_filter.
imports: Coq(Reals ssreflect ssrbool) mathcomp(seq) Rcomplements Hierarchy SF_seq RInt