• Quasicontinuous selections of upper continuous set-valued mappings

      Cao, J; Moors, WB (Michigan State University Press, 2006)
      In this paper, we extend a theorem of Matejdes on quasicontinuous selections of upper Baire continuous set-valued mappings from compact (or separable) metric range spaces to regular T1 range spaces. In addition, we also ...
    • Wijsman hyperspaces: subspaces and embeedings

      Cao, J; Junnila, HJK; Moors, WB (Elsevier, 2011)
      In this paper, topological properties of Wijsman hyperspaces are investigated. We study the existence of isolated points in Wijsman hyperspaces. We show that every Tychonoff space can be embedded as a closed subspace in ...