What are the unit elements in $\Bbb{Z}[i]$?
31382
Units of Gaussian integers
93017
Isomorphism between $\Bbb R$ and $\Bbb R(X)$?
66020
What is $\mathbb Z[[t]]$? What are the double brackets?
7938
Number of Homomorphisms from $\Bbb{Z}_m$ to $\Bbb{Z}_n$
127237
Let $I = \{a +ib \in \Bbb Z[i] : a$ and $b$ are both multiple of $5\}$.
132193
Why $\Bbb Z$ = (integers) is an integral domain?
144789
identify the ring $\mathbb{Z}[x]/(2x-1)$
104513
Order of elements in $Z_n$
95863
Describe the units in $\mathbb{Z}[\sqrt{-d}]$
36142
What is $\mathbb Z \oplus \mathbb Z / \langle (2,2) \rangle$ isomorphic to?
92822
Finite number of elements generating the unit ideal of a commutative ring
22563
Units and Nilpotents
4156
What is $\Bbb R^{\times}$? [unit group, ring to "times" power]
7303
How many idempotent elements does the ring ${\bf Z}_n$ contain?
57166
Showing that $\Bbb R[x] / \langle x^2 + 1 \rangle$ is isomorphic to $\Bbb C$ question
6171
Isomorphism between $\Bbb{Z}[\sqrt{d}]$ and a quotient of $\Bbb{Z}[X].$
126859
$\Bbb Z^\ast$ What is this notation?