Pointclass
id:
pointclass-265-13511287
title:
Pointclass
text:
In the mathematical field of descriptive set theory, a pointclass is a collection of sets of points, where a point is ordinarily understood to be an element of some perfect Polish space. In practice, a pointclass is usually characterized by some sort of definability property; for example, the collection of all open sets in some fixed collection of Polish spaces is a pointclass. Pointclasses find application in formulating many important principles and theorems from set theory and real analysis.
brand slug:
wiki
category slug:
encyclopedia
description:
Descriptive set theory concept
original url:
https://en.wikipedia.org/wiki/Pointclass
date created:
date modified:
2024-04-02T14:59:24Z
main entity:
{"identifier":"Q7208299","url":"https://www.wikidata.org/entity/Q7208299"}
image:
fields total:
13
integrity:
14