• Volterra versus Baire spaces?

      Cao, J; Junnila, H (AUT University, 2006)
      A topological space X is called Volterra if for each pair of real-valued functions f,g: X → R such that C(f) and C(g) are dense, C(f)∩C(g) is also dense, where C(f) and C(g) are sets of points of continuity of f and g ...
    • Wijsman hyperspaces: subspaces and embeddings

      Cao, J; Junnila, H; Moors, W (Cornell University, 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 ...