1974/85/1

Closed retractions of Euclidean spaces

Extension of closed mappings

Fixed points of certain symmetric product mappings of a metric manifold

Weights of denumerable topological spaces

Absolute Z-sets

On a generalization of Mycielski's and Znám's conjectures about coset decomposition of Abelian groups

A new definition of the circle by the use of bisectors

Radicals of semi-group rings

An uncountable collection of mutually exclusive planar atriodic tree-like continua with positive span

On smooth continua