A characterization of closed maps using the Whyburn construction.
Closed retractions of Euclidean spaces
Completion as reflection
Covariant and contravariant approaches to topology.
Finite spaces and the universal bundle of a group
We find sufficient conditions for a cotriad of which the objects are locally trivial fibrations, in order that the push-out be a locally trivial fibration. As an application, the universal -bundle of a finite group , and the classifying space is modeled by locally finite spaces. In particular, if is finite, then the universal -bundle is the limit of an ascending chain of finite spaces. The bundle projection is a covering projection.
-sets and near compact spaces
Si provano nuovi risultati riguardanti gli «-sets» e gli spazi «Near-compact». Si completano alcune ricerche pubblicate dai primi due autori nel 1978 e si risolvono due problemi recentemente posti da Cammaroto, Gutierrez, Nordo e Prada.
On certain constructions in finitistic spaces.
On -finitistic spaces and related notions.
Sul la theorie de la dimension dans les hypergroupes
Unified spaces and singular sets for mappings of locally compact spaces
Бикомпактификации переферически бикомпактных пространств