Eine Bemerkung zu total beschränkten Mengen.
Enlarging the convergence on the real line via metrizable group topologies
Equivalent metrics and the spans of graphs
We present a result which affords the existence of equivalent metrics on a space having distances between certain pairs of points predetermined, with some restrictions. This result is then applied to obtain metric spaces which have interesting properties pertaining to the span, semispan, and symmetric span of metric continua. In particular, we show that no two of these variants of span agree for all simple closed curves or for all simple triods.
Errata to the paper “On paracompact locales and metric locales”
Errata to the paper "Some properties of convex metric spaces" Fundamenta Mathematicae 73 (1972), pp. 193-198
Estimating mathematical information on Graphs: A Scientific Approach
Every Lusin set is undetermined in the point-open game
We show that some classes of small sets are topological versions of some combinatorial properties. We also give a characterization of spaces for which White has a winning strategy in the point-open game. We show that every Lusin set is undetermined, which solves a problem of Galvin.
Extending metrics uniformly
Extension of Lipschitz mappings on metric trees
Extension of locally uniformly equivalent metrics
Extensions of metrization theorems to higher cardinality