The nilradical of $\mathbb{Z}_m$
69373
Prove that $(0)$ is a radical ideal in $\mathbb{Z}/n\mathbb{Z}$ iff $n$ is square free
141124
Automorphisms of the ring $\Bbb Z[x]$ of polynomials with integer coefficients
124864
A not free $\mathbb{Z}$-module
119297
Finding invertible polynomials in polynomial ring $\mathbb{Z}_{n}[x]$
5906
All group homomorphism from $ \mathbb{Z} _m $ to $\mathbb{Z}_n $
28934
Presentation of SL$(n,\mathbb{Z}_p)$
17978
Isomorphism classes of $\mathbb{Z}[i]$ modules.
129438
Gaussian Integers and Quotient Rings
80211
Annihilator of quotient module M/IM
14403
If $n = p_1^{a_1} ... p_r^{a_r}$ the set of nilpotents of $\mathbb{Z}_n$ is $(p_1 p_2 ... p_{r-1} p_r)\Bbb Z_n$
30401
Determining the structure of the quotient ring $\mathbb{Z}[x]/(x^2+3,p)$
5577
If $m$ divides $n$, find a free resolution of $\mathbb{Z}/m$ as a $\mathbb{Z}/n$-module.
118299
Show that $(\mathbb{Z}[x]/(x^{n+1}))^{\times}\cong \mathbb{Z}/2\mathbb{Z}\times\Pi_{i=1}^n\mathbb{Z}$
13761
Automorphisms in $\mathbb{Z}_n$
21840
Zero divisors and units for the ring $\mathbb{Z}/n\mathbb{Z}$ with integer $n$
135611
Extensions of $\mathbb{Z}$ by $\mathbb{Z}$
51695
Finding all homomorphisms between $\mathbb{Z}/m\mathbb{Z}$ and $\mathbb{Z}/n\mathbb{Z}$