Some characterizations of $\sigma$- and $\Sigma$-spaces

DOI10.3792/pja/1195519727zbMath0246.54034OpenAlexW1967781161MaRDI QIDQ5658812

Jun-iti Nagata

Publication date: 1972

Published in: Proceedings of the Japan Academy, Series A, Mathematical Sciences (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.3792/pja/1195519727

Mathematics Subject Classification ID

Metric spaces, metrizability (54E35) Special maps on topological spaces (open, closed, perfect, etc.) (54C10)

Cites Work

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• On closed mappings and $M$-spaces, I
• A note on nets and metrization
• Σ-spaces
• A survey of the theory of M-spaces
• A survey of the theory of σ-spaces
• On multi-valued mappings and generalized metric spaces
• Paracompactness and product spaces