Borel hierarchy
id:
borel-hierarchy-194-2407972
title:
Borel hierarchy
text:
In mathematical logic, the Borel hierarchy is a stratification of the Borel algebra generated by the open subsets of a Polish space; elements of this algebra are called Borel sets. Each Borel set is assigned a unique countable ordinal number called the rank of the Borel set. The Borel hierarchy is of particular interest in descriptive set theory. One common use of the Borel hierarchy is to prove facts about the Borel sets using transfinite induction on rank. Properties of sets of small finite ra
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wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Borel_hierarchy
date created:
date modified:
2023-11-27T20:33:03Z
main entity:
{"identifier":"Q893487","url":"https://www.wikidata.org/entity/Q893487"}
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fields total:
13
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13