Door space
id:
door-space-259-6110551
title:
Door space
text:
In mathematics, specifically in the field of topology, a topological space is said to be a door space if every subset is open or closed. The term comes from the introductory topology mnemonic that "a subset is not like a door: it can be open, closed, both, or neither".
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Door_space
date created:
date modified:
2023-05-26T19:22:13Z
main entity:
{"identifier":"Q5297210","url":"https://www.wikidata.org/entity/Q5297210"}
image:
fields total:
13
integrity:
13