Nilpotents of $\Bbb{Z}_n$
133019
Nilpotent elements in $\mathbb Z_n$
153664
When is $\Bbb{Z[\zeta_n]}$ a PID?
102112
Idempotents in $\mathbb Z_n$
121100
Rootspaces are $\mathop{ad}$ nilpotent
114916
$\mathbb Z_{mn}$ isomorphic to $\mathbb Z_m\times\mathbb Z_n$ whenever $m$ and $n$ are coprime
9794
Quotient ring of Gaussian integers $\mathbb{Z}[i]/(a+bi)$ when $a$ and $b$ are NOT coprime
141124
Automorphisms of the ring $\Bbb Z[x]$ of polynomials with integer coefficients
29003
Is the dihedral group $D_n$ nilpotent? solvable?
156909
$\Bbb{Z}_{26} \rtimes_{\alpha} \Bbb{Z}_{5} \cong \Bbb{Z}_{26} \times \Bbb{Z}_{5}$ as groups.
39657
Strictly Upper Triangular $n\times n$ Matrices form a Nilpotent Lie Algebra over $\mathbb{C}$ for $n\geq 2$
132725
Is $\mathbb{Z}/\langle n\rangle$ cyclic and of order $n$?
5906
All group homomorphism from $ \mathbb{Z} _m $ to $\mathbb{Z}_n $
146969
Proving that every group of order $4$ is isomorphic to $\Bbb Z_4$ or $\Bbb Z^*_8$
102938
$\Bbb F_2[X]$ modules with 8 elements
119648
For which $n$ and $k$ are there nontrivial homomorphisms from $S_n$ to $\mathbb{Z}/k\mathbb{Z}$?
5699
The number of ring homomorphisms from $\mathbb{Z}_m$ to $\mathbb{Z}_n$
22563
Units and Nilpotents