Wedge sum
id:
wedge-sum-291-7245820
title:
Wedge sum
text:
In topology, the wedge sum is a "one-point union" of a family of topological spaces. Specifically, if X and Y are pointed spaces the wedge sum of X and Y is the quotient space of the disjoint union of X and Y by the identification x 0 ∼ y 0 : where ∼ is the equivalence closure of the relation { } . More generally, suppose i ∈ I is a indexed family of pointed spaces with basepoints i ∈ I . The wedge sum of the family is given by: where ∼ is the equivalence closure of the relation { : i , j ∈ I }
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Wedge_sum
date created:
date modified:
2021-06-30T18:02:35Z
main entity:
{"identifier":"Q1781358","url":"https://www.wikidata.org/entity/Q1781358"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/6/65/Wedge_of_Two_Circles.png","width":354,"height":120}
fields total:
13
integrity:
14