On locally expansive selfcoverings of compact metrizable spaces
On metric products
On metrizability of continuous images of compact ordered spaces
On metrization of the uniformity of a product of metric spaces
On -in-countable bases
Some results concerning spaces with countably weakly uniform bases are generalized for spaces with -in-countable ones.
On neighborhoods of the Kuratowski imbedding beyond the first extremum of the diameter functional
On non-normality points, Tychonoff products and Suslin number
Let a space be Tychonoff product of -many Tychonoff nonsingle point spaces . Let Suslin number of be strictly less than the cofinality of . Then we show that every point of remainder is a non-normality point of its Čech–Stone compactification . In particular, this is true if is either or and a cardinal is infinite and not countably cofinal.
On non-separable 0-dimensional metrizable spaces
On Optimal Realizations of Finite Metric Spaces by Graphs.
On paracompact locales and metric locales
On Polish spaces Lipschitz universal for separable metric spaces
On preimages of ultrafilters in ZF
We show that given infinite sets and a function which is onto and -to-one for some , the preimage of any ultrafilter of under extends to an ultrafilter. We prove that the latter result is, in some sense, the best possible by constructing a permutation model with a set of atoms and a finite-to-one onto function such that for each free ultrafilter of its preimage under does not extend to an ultrafilter. In addition, we show that in there exists an ultrafilter compact pseudometric...
On prime ideals of
On -metrizable spaces
On sequence-covering --images of locally separable metric spaces
On shapes of topological spaces
On Simultaneous Fixed Points of Multi-Valued Maps.
On some covering properties of metric spaces
On some metrizations of the hyperspace of compact sets
On some properties of hyperconvex spaces.