How to find $\left|\operatorname{Aut}(\mathbb Z_2\times\mathbb Z_2)\right|$
50130
$\operatorname{Aut}(V)$ is isomorphic to $S_3$
120594
$\mathbb Z[i]/ \langle 1+2i \rangle \cong \mathbb Z_5$
134840
Generators and relations for $\text{PSL}(2, \mathbb{F}_q)$
74187
$\operatorname{ord}(u)=r,\,\operatorname{ord}(v)=s$ $\,\Rightarrow\,\operatorname{ord}(uv)=rs\,$ if $\,r,s\,$ (co)primes
79276
Find $\min(\operatorname{trace}(AA^T))$ for invertible $A_{n\times n}$
67644
How does one get the formula for this bijection from $\mathbb{N}\times\mathbb{N}$ onto $\mathbb{N}$?
70861
$\mathbb P^n\times \mathbb P^m\not\cong \mathbb P^{m+n}$
39492
Finding $z\in \mathbb C$ with $\sin z = 2$?
34017
Show that $n^{\pi\left(2n\right)-\pi\left(n\right)}2$
117688
Prove that $\def\Aut{\operatorname{Aut}}\Aut(\mathbf{Z_{n}})\simeq \mathbf{Z_{n}^{*}}$
129750
Order of $SL_2(\mathbb{Z}/ n\mathbb{Z})$
118299
Show that $(\mathbb{Z}[x]/(x^{n+1}))^{\times}\cong \mathbb{Z}/2\mathbb{Z}\times\Pi_{i=1}^n\mathbb{Z}$
33338
Problem on $\operatorname{Hom}(\mathbb Z_6,R^*\oplus C^*)$
7890
Prove the map $\Phi:G\to\operatorname{Aut}G$ with $g\mapsto (x\mapsto g^{-1}xg)$ is an homomorphism.
127198
What is $\mathbb{C}^{Aut(\mathbb{C}/\mathbb{Q})}$?
156549
Prove that there is no group $G$ s.t. $\operatorname{Aut}(G)=\mathbb{Q}$
137201
Classifying $\mathbb{Z} \times \mathbb{Z} \times \mathbb{Z} / \langle(3,3,3)\rangle$