On the pullback stability of a quotient map with respect to a closure operator.
On the relation between continuous and connected functions
On the set of points of discontinuity for functions with closed graphs
On the theory of - and -spaces in general topology
On the Uniform Convergence of Sequences of Open First Baire Class Functions.
On the weak-open images of metric spaces
In this paper, we give characterizations of certain weak-open images of metric spaces.
On the -continuous fixed point property.
On Topological Spaces With Dense Completely Metrizable Subspaces
On transfinite dimension
On trivially semi-metrizable and D-completely regular mappings
Trivially symmetrizable, trivially semi-metrizable and trivially D-completely regular mappings are defined. They are characterized as mappings parallel to symmetrizable, semi-metrizable and D-completely regular spaces correspondently. One shows that trivially D-completely regular mappings, i.e. submappings of fibrewise products of developable mappings coincide (up to homeomorphisms) with submappings of fibrewise products of semi-metrizable mappings.
On two theorems of Dyer
On uniform spaces
On uniform spaces with linearly ordered bases II (-metric spaces)
On upper and lower -continuous multifunctions.
On weak forms of preopen and preclosed functions
In this paper we introduce two classes of functions called weakly preopen and weakly preclosed functions as generalization of weak openness and weak closedness due to [26] and [27] respectively. We obtain their characterizations, their basic properties and their relationshisps with other types of functions between topological spaces.
On weakly closed functions
On weakly -continuous functions
On weak-open compact images of metric spaces.
On weak-open -images of metric spaces
In this paper, we give some characterizations of metric spaces under weak-open -mappings, which prove that a space is -developable (or Cauchy) if and only if it is a weak-open -image of a metric space.
On --open sets and a decomposition of almost--continuity.