Why $\mathbb Z_2\otimes_{\mathbb Z}\mathbb Z_3\cong \{0\}$?
30752
Proof of $(\mathbb{Z}/m\mathbb{Z}) \otimes_\mathbb{Z} (\mathbb{Z} / n \mathbb{Z}) \cong \mathbb{Z}/ \gcd(m,n)\mathbb{Z}$
108550
Elements of $\mathbb Q(2^{1/3})$
101164
Show that $B \cong \mathbb Z /2\mathbb Z$ for a Boolean field B
84017
Is $\sqrt[3]{2}$ contained in $\mathbb{Q}(\zeta_n)$?
151786
Proving that there is no ideal $I$ in $\mathbb{Z}[t]$ such that $\mathbb{Z}[t]/I \cong \mathbb{Q}$
147564
Why does $(A/I)\otimes_R (B/J)\cong(A\otimes_R B)/(I\otimes_R 1+1\otimes_R J)$?
8374
How to prove that $R/I \otimes_R M \cong M / IM$
70861
$\mathbb P^n\times \mathbb P^m\not\cong \mathbb P^{m+n}$
68915
What are the units in $\mathbb{Z}[\root 3 \of 2]$?
64179
What is the difference between the standard representants of $\mathbb Z/q\mathbb Z$?
136804
Computing $\mathrm{Hom}(\mathbb Z_n,\mathbb Z_m)$ as $\mathbb Z$-module
120594
$\mathbb Z[i]/ \langle 1+2i \rangle \cong \mathbb Z_5$
76501
How can we show that $\mathbb Q$ is not a free $\mathbb Z$-module?
108044
Isomorphic extensions of $\mathbb Z_3$ by $\mathbb Z_3 \times \mathbb Z_3$ which are not equivalent
57434
$SL_2(\mathbb Z_3)/Z(SL_2(\mathbb Z_3)) \cong A_4$
128732
$\mathbb Z_{p^n}$ is not the direct product of any family of its proper subgroups
146980
Zero divisors of $\mathbb{Z}×\mathbb{Z}×\mathbb{Z}$