On a class of topological spaces containing all bicompact and all connected spaces
On a closed range theorem for nonlinear operators
On a convergence property of set algebras
On a factorization lemma and a construction of absolute without separation axioms
On a mechanism of choosing morphisms in concrete categories
On a method which leads to extremally disconnected covers
On a problem of Katětov
On a theorem of Michael-Morita-Hanai
On an example of Mary Ellen (Estill) Rudin
On an extension of Pontryagin's duality theory
On an inequality concerning Cartesian multiplication
On cardinal invariants
On closed graph theorems
On cohesive mappings
On completions of convergence commutative groups
On condensation numbers
On convergence in the space of summations
On convergence topologies
On countability of the spectrum of Banach space valued weakly almost-periodic functions
On descriptive classification of functions