Telephone number (mathematics)
id:
telephone-number-mathematics-240-12372727
title:
Telephone number (mathematics)
text:
In mathematics, the telephone numbers or the involution numbers form a sequence of integers that count the ways n people can be connected by person-to-person telephone calls. These numbers also describe the number of matchings of a complete graph on n vertices, the number of permutations on n elements that are involutions, the sum of absolute values of coefficients of the Hermite polynomials, the number of standard Young tableaux with n cells, and the sum of the degrees of the irreducible repre
brand slug:
wiki
category slug:
encyclopedia
description:
Number of ways to pair up n objects
original url:
https://en.wikipedia.org/wiki/Telephone_number_(mathematics)
date created:
date modified:
2024-03-03T15:09:01Z
main entity:
{"identifier":"Q7696507","url":"https://www.wikidata.org/entity/Q7696507"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/7/7f/K4_matchings.svg","width":270,"height":351}
fields total:
13
integrity:
15