---
tag: 47TQFKDJPV
kind: concept
name: Singleton (mathematics)
aliases: [monoplet, one-point-set, singleton-set-theory, singleton-set, unit-set]
sources:
  - wikipedia: en:381798@r1360442170
    locator: Singleton (mathematics)
    note: adopted
    mention: wikipedia://en/381798
    sections: [Summary]
same_as:
  wikidata: Q1165112
  wikipedia: Singleton (mathematics)
inventory: [QBADH667J4]
---

## Summary

In mathematics, a **singleton** (also known as a **unit set** or **one-point set**) is a [[set|0BSJ7RQ9BW]] with [[exactly one|0QAJHFGZZJ]] element. For example, the set $\{0\}$ is a singleton whose single element is $0$.