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List Question

For $a=\cos(2\pi/n)$, show that $[\mathbb{Q}(a):\mathbb{Q}] = \ldots$

Intermediate field of $\mathbb{Q}(\zeta_{17})/\mathbb{Q}$ by $\sigma^8$

Did I Do This Galois Theory Problem Right? Subfields of $\mathbb{Q}(\zeta_{12})$.

Lower bound for cyclotomic polynomials evaluated at an integer

Primitive element of the fixed field of a subgroup of the galois group of a prime cyclotomic extension

When is $(x^n-1)/(x-1)$ a prime number?

Minimal polynomial for $\zeta+\zeta^5$ for a primitive seventh root of unity $\zeta$

Factoring Cyclotomic Polynomials Over $\mathbb{F}_p$.

Cyclotomic field of $5$ th root of Unity

Towards a formula for the Euler $\phi$ function?

Detect cyclotomic polynomials

Number of terms containing primitive root of unity

Splitting $\Phi_{15}$ in irreducible factors over $\mathbb{F}_7$

Irrational roots of unity?

Sum of roots of unity an algebraic integer proof

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