Assertion: ring's set | /r/HasProperty | group
Facets:
value: under ring multiplication
type: OTHER
Source sentences:
text: The set of units of a ring is a group under ring multiplication; this group is denoted by R × {\displaystyle R^{\times }} or R ∗ {\displaystyle R^{*}} or U ( R ) {\displaystyle U(R)} .