- -

Browsing by Author "Tkachuk, Vladimir V."

RiuNet: Institutional repository of the Polithecnic University of Valencia

Browsing by Author "Tkachuk, Vladimir V."

Sort by: Order: Results:

  • thumb
    Cofinitely and co-countably projective spaces 
    Mendoza Iturralde, Pablo; Tkachuk, Vladimir V. (Universitat Politècnica de València, 2002-10-01)
    [EN] We show that X is cofinitely projective if and only if it is a finite union of Alexandroff compactatifications of discrete spaces. We also prove that X is co-countably projective if and only if X admits no disjoint ...
  • thumb
    Condensations of Cp(X) onto σ-compact spaces 
    Tkachuk, Vladimir V. (Universitat Politècnica de València, 2009-04-01)
    [EN] We show, in particular, that if nw(Nt) ≤ k for any t ϵ T and C is a dense subspace of the product ǁ{Nt : t 2 T} then, for any continuous (not necessarily surjective) map ϕ : C ͢ K of C into a compact space K with ...
  • thumb
    Strengthening connected Tychonoff topologies 
    Shakhmatov, Dimitri; Tkachenko, Mikhail; Tkachuk, Vladimir V.; Wilson, Richard G. (Universitat Politècnica de València, 2002-10-01)
    [EN] The problem of whether a given connected Tychonoff space admits a strictly finer connected Tychonoff topology is considered. We show that every Tychonoff space X satisfying ω (X) ≤ c and c (X) ≤ N0 admits a finer ...
  • thumb
    When is an ultracomplete space almost locally compact? 
    Jardón Arcos, Daniel; Tkachuk, Vladimir V. (Universitat Politècnica de València, 2006-10-01)
    [EN] We study spaces X which have a countable outer base in βX; they are called ultracomplete in the most recent terminology. Ultracompleteness implies Cech-completeness and is implied by almost local compactness (≡having ...