show · ring.unit all knowls · up · search:

A unit in a commutative ring $R$ is an element $x \in R$ so that there exists $y \in R$ with $xy = 1$. The set of units in $R$ is denoted $R^*$ or $R^\times$ and forms a group under multiplication.

Authors:
Knowl status:
  • Review status: reviewed
  • Last edited by John Voight on 2020-10-23 11:21:08
Referred to by:
History: (expand/hide all) Differences (show/hide)