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Subjects
54-XX General topology
54Exx Spaces with richer structures
54E18 $p$ -spaces, $M$ -spaces, $σ$ -spaces, etc.

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Mapping theorems on $ℵ$ -spaces

Masami Sakai (2008)

Commentationes Mathematicae Universitatis Carolinae

In this paper we improve some mapping theorems on $ℵ$ -spaces. For instance we show that an $ℵ$ -space is preserved by a closed and countably bi-quotient map. This is an improvement of Yun Ziqiu’s theorem: an $ℵ$ -space is preserved by a closed and open map.

Metrizability, generalized metric spaces and $g$ -functions

Jun-iti Nagata (1988)

Commentationes Mathematicae Universitatis Carolinae

Currently displaying 1 – 2 of 2

Page 1

Displaying 1 – 2 of 2

Mapping theorems on ℵ -spaces

Metrizability, generalized metric spaces and g -functions

Currently displaying 1 – 2 of 2

Mapping theorems on $ℵ$ -spaces

Metrizability, generalized metric spaces and $g$ -functions