# On <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi mathvariant="fraktur">P</mml:mi></mml:math>-spaces and related concepts

> Research article (Topology and its Applications, 2015) · cited 31× · AI/ML

**Wikidata**: [openalex:W757882982](https://www.wikidata.org/wiki/openalex:W757882982)  
**Source**: https://4ort.xyz/entity/on-mml-math-xmlns-mml-http-www-w3-org-1998-math-mathml-altimg-si1-gif-overflow-scroll-mml-mi-mathvariant-fraktur-p-mml-m