Units in ring theory
31382
Units of Gaussian integers
67919
Subgroup of the unit circle under complex multiplication
68915
What are the units in $\mathbb{Z}[\root 3 \of 2]$?
79650
Division Rings and Division Algebras
10760
Why is the product of all units of a finite field equal to $-1$?
107821
The ring of integers of $\mathbf{Q}[i]$
154530
Rings whose elements are partitioned between units and zero-divisors.
7303
How many idempotent elements does the ring ${\bf Z}_n$ contain?
69012
How to directly prove every element in a ring with exactly three ideals is either a unit or a zero divisor?
153291
Why a ring homomorphism from a local ring will not map a non-unit to a unit？
16023
Are associates unit multiples in a commutative ring with $1$?
24203
Finding Zero Divisors and Units of Rings $\mathbb{Z}_n \times \mathbb{Z}_m$
61391
Which finite groups are the group of units of some ring?
24259
Quotient ring of $T/I$
12110
How are $2\mathbb{Z}\ncong3\mathbb{Z}$ different as rings?
119067
Basic Ring Theory Question involving the unit element
4156
What is $\Bbb R^{\times}$? [unit group, ring to "times" power]