Kuratowski's closure-complement problem
id:
kuratowski-s-closure-complement-problem-240-15872209
title:
Kuratowski's closure-complement problem
text:
In point-set topology, Kuratowski's closure-complement problem asks for the largest number of distinct sets obtainable by repeatedly applying the set operations of closure and complement to a given starting subset of a topological space. The answer is 14. This result was first published by Kazimierz Kuratowski in 1922. It gained additional exposure in Kuratowski's fundamental monograph Topologie before achieving fame as a textbook exercise in John L. Kelley's 1955 classic, General Topology.
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wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Kuratowski%27s_closure-complement_problem
date created:
date modified:
2024-02-25T19:35:00Z
main entity:
{"identifier":"Q6445654","url":"https://www.wikidata.org/entity/Q6445654"}
image:
fields total:
13
integrity:
13