Is $\mathbb Z[ \sqrt{-3}]$ UFD?
24413
Why is $\mathbb{Z}[\sqrt{-n}], n\ge 3$ not a UFD?
58717
Why isn't $\mathbb Z [\sqrt{pq}]$ a factorial domain
131185
For fixed $z_i$s inside the unit disc, can we always choose $a_i$s such that $\left|\sum_{i=1}^n a_iz_i\right|<\sqrt3$?
53575
Describe $R=\mathbb{Z}[X]/(X^2-3,2X+4)$
117789
Computing Galois Group of $\mathbb{Q}(\sqrt{2},\sqrt{3}):\mathbb{Q}$
112556
When is $F(\sqrt c)$ a field?
104300
Help justifying that $\mathbb Q(\sqrt[3]{2})$ is not a splitting field over $\mathbb Q$.
66238
Proving $\mathbb{Z}[\sqrt {10}]$ is not a UFD
68838
Why $\sqrt[3]{3}\not\in \mathbb{Q}(\sqrt[3]{2})$?
29635
Fields finitely generated as $\mathbb Z$-algebras are finite?
145752
Aut $\mathbb Z_p\simeq \mathbb Z_{p-1}$
32760
Is $\mathbf{Q}(\sqrt{2}, \sqrt{3}) = \mathbf{Q}(\sqrt{2}+\sqrt{3})$?
60665
Meaning of $\mathbb{Z}\left[\sqrt{3}\right]$?
75970
$\mathbb Z[1/2]$ is not finitely generated?
6171
Isomorphism between $\Bbb{Z}[\sqrt{d}]$ and a quotient of $\Bbb{Z}[X].$
43300
The degree of $\sqrt{2} + \sqrt[3]{5}$ over $\mathbb Q$
16507
Is $\mathbb{Z}= \{\dots -3, -2, -1, 0 ,1 ,2 , 3, \dots \}$ countable?