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On (transfinite) small inductive dimension of products

Vitalij A. Chatyrko, Konstantin L. Kozlov (2000)

Commentationes Mathematicae Universitatis Carolinae

In this paper we study the behavior of the (transfinite) small inductive dimension ( t r i n d ) i n d on finite products of topological spaces. In particular we essentially improve Toulmin’s estimation [T] of t r i n d for Cartesian products.

On trivially semi-metrizable and D-completely regular mappings

F. Cammaroto, G. Nordo, B. A. Pasynkov (2002)

Bollettino dell'Unione Matematica Italiana

Trivially symmetrizable, trivially semi-metrizable and trivially D-completely regular mappings are defined. They are characterized as mappings parallel to symmetrizable, semi-metrizable and D-completely regular spaces correspondently. One shows that trivially D-completely regular mappings, i.e. submappings of fibrewise products of developable mappings coincide (up to homeomorphisms) with submappings of fibrewise products of semi-metrizable mappings.

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