---
tag: 0FJ90Y9926
kind: concept
name: Group of units of a monoid
aliases: [units-of-a-monoid]
msc: [20M10]
sources:
  - url: https://en.wikipedia.org/wiki/Unit_(ring_theory)
    locator: Group of units
---

## Summary

The units of a monoid are its invertible elements.
They form a group under the operation of the monoid.