On Lipschitz ball noncollapsing functions and uniform co-Lipschitz mappings of the plane.
On local expansions
On local isometries and isometries in metric spaces
On local merotopic character
On locally expansive selfcoverings of compact metrizable spaces
On locally finite coverings
On locally nonexpansive mappings and local isometries
On Martin's axiom and perfect spaces
On meager function spaces, network character and meager convergence in topological spaces
For a non-isolated point of a topological space let be the smallest cardinality of a family of infinite subsets of such that each neighborhood of contains a set . We prove that (a) each infinite compact Hausdorff space contains a non-isolated point with ; (b) for each point with there is an injective sequence in that -converges to for some meager filter on ; (c) if a functionally Hausdorff space contains an -convergent injective sequence for some meager filter...
On medial properties of maps
On metric preserving functions and infinite derivatives.
On metric products
On metrizability of continuous images of compact ordered spaces
On metrizable abelian groups with a completeness-type property
On metrization of the uniformity of a product of metric spaces
On monotonic generalizations of Moore spaces, Čech complete spaces and p-spaces
On -in-countable bases
Some results concerning spaces with countably weakly uniform bases are generalized for spaces with -in-countable ones.
On --normal and --quasinormal semi-Hilbertian space operators
The purpose of the paper is to introduce and study a new class of operators on semi-Hilbertian spaces, i.e. spaces generated by positive semi-definite sesquilinear forms. Let be a Hilbert space and let be a positive bounded operator on . The semi-inner product , , induces a semi-norm . This makes into a semi-Hilbertian space. An operator is said to be --normal if for some positive integers and .
On Nachbin's problem concerning uniformizable ordered spaces
On natural merotopies