1969/64/2

Left completely continuous semi-algebras

Universality of the product mappings onto products of In and snake-like spaces

D-spaces and fixed point theorems

On choosing subsets of n-element sets

On the composition and products of universal mappings

Euklidische und Minkowskische Orthogonalitätsrelationen

Periodic homeomorphisms on chainable continua

Expansive homeomorphisms on homogeneous spaces

Some cover properties of spaces

Some results on AC-ω functions

Normal models and the field ${\displaystyle \Sigma {\cdot }_1}$

On equational classes of abstract algebras defined by regular equations

Infinite complementation in the lattice of topologies