Properties

Label 17.8.6.1
Base \(\Q_{17}\)
Degree \(8\)
e \(4\)
f \(2\)
c \(6\)
Galois group $C_4\times C_2$ (as 8T2)

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Defining polynomial

\(x^{8} + 64 x^{7} + 1548 x^{6} + 16960 x^{5} + 74840 x^{4} + 51968 x^{3} + 39432 x^{2} + 270464 x + 1062564\) Copy content Toggle raw display

Invariants

Base field: $\Q_{17}$
Degree $d$: $8$
Ramification exponent $e$: $4$
Residue field degree $f$: $2$
Discriminant exponent $c$: $6$
Discriminant root field: $\Q_{17}$
Root number: $-1$
$\card{ \Gal(K/\Q_{ 17 }) }$: $8$
This field is Galois and abelian over $\Q_{17}.$
Visible slopes:None

Intermediate fields

$\Q_{17}(\sqrt{3})$, $\Q_{17}(\sqrt{17})$, $\Q_{17}(\sqrt{17\cdot 3})$, 17.4.2.1, 17.4.3.2, 17.4.3.1

Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.

Unramified/totally ramified tower

Unramified subfield:$\Q_{17}(\sqrt{3})$ $\cong \Q_{17}(t)$ where $t$ is a root of \( x^{2} + 16 x + 3 \) Copy content Toggle raw display
Relative Eisenstein polynomial: \( x^{4} + 17 \) $\ \in\Q_{17}(t)[x]$ Copy content Toggle raw display

Ramification polygon

Residual polynomials:$z^{3} + 4z^{2} + 6z + 4$
Associated inertia:$1$
Indices of inseparability:$[0]$

Invariants of the Galois closure

Galois group:$C_2\times C_4$ (as 8T2)
Inertia group:Intransitive group isomorphic to $C_4$
Wild inertia group:$C_1$
Unramified degree:$2$
Tame degree:$4$
Wild slopes:None
Galois mean slope:$3/4$
Galois splitting model:Not computed