Find all $n \in \mathbb{Z}$, such that $\phi(2n)=\phi(3n)$?
35712
Solve for n: $\varphi(2n)=\varphi(3n)$
34960
Lower bound for $\phi(n)$: Is $n/5  1$?
30404
Is $\mathbb{Z}/3\otimes \mathbb{Z}[1/2]=\mathbb{Z}/3$?
97258
Give $\ker(\phi)$ for $\phi: \mathbb{Z} \to \mathbb{Z_7}$ such that $\phi(1)=4$
120699
Is $\mathcal{O}_{\mathbb{Q}(\sqrt{5})} = \mathbb{Z}[\phi]$?
58663
How to show that if $\phi(n)$ equals to n itself, then n must be 1?
27942
showing that $n$th cyclotomic polynomial $\Phi_n(x)$ is irreducible over $\mathbb{Q}$
149509
What method would you go through to find an $n$ such that $\phi(n)=100$?
9753
How to solve the equation $\phi(n) = k$?
52565
Prove that if $d \mid n \in \mathbb{N}$, then $\varphi(d) \mid \varphi(n)$.
60284
Infinitely many positive integers $n$ such that $\phi(n) = \frac{n}{4}$?
31216
Is the image of $\Phi_n(x) \in \mathbb{Z}[x]$ in $\mathbb{F}_q[x]$ still a cyclotomic polynomial?
48655
Find all n such that : $3 \mid (n2^{n}+1)$
78218
$A \in M_3(\mathbb Z)$ be such that $\det(A)=1$ ; then what is the maximum possible number of entries of $A$ that are even ?
138026
To show that $n!f(x) \in \mathbb{Z}[x]$
31436
Show that for all $a\in\mathbb{N}$, there exists $b\in\mathbb{N}$ and square-free integer $c$ such that $\sqrt{a}=b\sqrt{c}$.
63478
Is $\mathbb{Q}(\sqrt{2}) \cong \mathbb{Q}(\sqrt{3})$?