Find the units in the ring $\mathbb Z_4\times\mathbb Z_6$
24203
Finding Zero Divisors and Units of Rings $\mathbb{Z}_n \times \mathbb{Z}_m$
107821
The ring of integers of $\mathbf{Q}[i]$
20613
Units (invertibles) of polynomial rings over a field
90433
Isomorphisms between $(\mathbb Z_4,+)$ and $(U_5,*)$
17239
Find all ideals of ${\mathbb{Z}_n}$
18361
Does the unit generate the additive group in a unital ring with cyclic additive group?
93703
Groups of units of $\mathbb{Z}\left[\frac{1+\sqrt{-3}}{2}\right]$
152306
Finding homomorphisms from $\mathbb Z_{12}$ to $\mathbb Z_{6}$.
128989
Is ${\bf Z} \times {\bf Z}$ elementarily equivalent to ${\bf Z}$?
19112
Ring $R= \mathbb Z_3[x]/\langle x^6-1\rangle$
122312
How can I compute $\mathrm{Aut}(\mathbb{Z}/4\mathbb{Z}\times\mathbb{Z}/6\mathbb{Z})$?
105913
Calculations in quotient rings
124438
Find $|(\mathbb{Z} \oplus \mathbb{Z}) / \langle(3,6)\rangle|$ and determine if its cyclic
102721
Number of elements in the ring $\mathbb Z [i]/\langle 2+2i\rangle$
118299
Show that $(\mathbb{Z}[x]/(x^{n+1}))^{\times}\cong \mathbb{Z}/2\mathbb{Z}\times\Pi_{i=1}^n\mathbb{Z}$
39231
Construct a bijection between $\mathbb{Z}^+\times \mathbb{Z}^+$ and $\mathbb{Z}^+$
115876
$D_6 \cong D_3\times \mathbb Z_2$