If a complex number with unit modulus is a root of a monic polynomial with integer coefficients, is it a root of unity?
126363
Are all algebraic integers with absolute value 1 roots of unity?
70203
If an polynomial has a complex root, is it necessary that its conjugate is also a root?
31977
How to prove sum of powers property of roots of unity?
81585
What is the square root of complex number i?
86807
The units of $\mathbb Z[\sqrt{2}]$
103376
Is $\sin(p \pi/q)$ necessarily an algebraic number?
20305
Complex roots of $z^3 + \bar{z} = 0$
150300
Root of unity for $n+1$
154393
Roots of polynomial with real coefficients appear in conjugate pairs.
97028
Find all irreducible monic polynomials in $\mathbb{Z}/(2)[x]$ with degree equal or less than 5
152831
When does a complex matrix have a square root?
7891
Sum of nth roots of unity
26728
Coefficient of $n$th cyclotomic polynomial equals $-\mu(n)$
111199
Does there exist a formula for product of the primitive $ n $th roots of unity.
68915
What are the units in $\mathbb{Z}[\root 3 \of 2]$?
99835
Polynomial in $\mathbb{Q}[x]$ with root $\sqrt[3]{2}+\sqrt[3]{3}$
147986
Prove: if $|z|=1$ than $\frac{z+1}{z-1}$ is an imaginary number