2 papers
math.GN2009
Selections, Paracompactness and Compactness
Mitrofan M. Choban, Ekaterina P. Mihaylova, Stoyan I. Nedev
In the present paper, the Lindelof number and the degree of compactness of spaces and of the cozero-dimensional kernel of paracompact spaces are characterized in terms of selection…
math.GN2008
A non-separable Christensen's theorem and set tri-quotient maps
S. Nedev, J. Pelant, V. Valov
For every space let be the set of all compact subsets of . Christensen \cite{c:74} proved that if are separable metrizable spaces and $F\colon\mathcal…