Half-disk topology
id:
half-disk-topology-293-6439018
title:
Half-disk topology
text:
In mathematics, and particularly general topology, the half-disk topology is an example of a topology given to the set X , given by all points in the plane such that y ≥ 0 . The set X can be termed the closed upper half plane. To give the set X a topology means to say which subsets of X are "open", and to do so in a way that the following axioms are met: The union of open sets is an open set.
The finite intersection of open sets is an open set.
The set X and the empty set ∅ are open sets.
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Half-disk_topology
date created:
date modified:
2023-05-15T04:09:11Z
main entity:
{"identifier":"Q5641600","url":"https://www.wikidata.org/entity/Q5641600"}
image:
fields total:
13
integrity:
13