On a Class of Darboux Functions from a Topological Space to a Uniform Space
On a mixed-type interpolation problem for real polynomials
On a problem of Lelek concerning open mappings
On a theorem of Holický and Zelený concerning Borel maps without -compact fibers
The paper is concerned with a recent very interesting theorem obtained by Holický and Zelený. We provide an alternative proof avoiding games used by Holický and Zelený and give some generalizations to the case of set-valued mappings.
On a theorem of P. S. Aleksandrov
On almost continuity and expansion of open sets.
On almost precontinuous functions.
On almost quasicontinuous functions
A function is said to be almost quasicontinuous at if for each neighbourhood of . Some properties of these functions are investigated.
On an affirmative answer to Y. Tanaka's and Y. Ge's problem
In this paper, we give an affirmative answer to the problem posed by Y. Tanaka and Y. Ge (2006) in "Around quotient compact images of metric spaces, and symmetric spaces", Houston J. Math. 32 (2006) no. 1, 99-117.
On approximately semiopen maps in topological spaces.
On atomic mappings
On barycentrically soft compacta
On binary coproducts of frames
The structure of binary coproducts in the category of frames is analyzed, and the results are then applied widely in the study of compactness, local compactness (continuous frames), separatedness, pushouts and closed frame homomorphisms.
On category-raising and dimension-raising open mappings with discrete fibers
On c-closed functions
On Čech cohomology and weakly confluent mappings into ANR's
On -chain-net spaces.
On cliquish functions on product spaces
On closed and inductively closed images of products of metric spaces
On closed graph theorems in topological spaces and groups