Properties

Label 5.8.7.2
Base \(\Q_{5}\)
Degree \(8\)
e \(8\)
f \(1\)
c \(7\)
Galois group $C_8:C_2$ (as 8T7)

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Defining polynomial

\(x^{8} + 5\) Copy content Toggle raw display

Invariants

Base field: $\Q_{5}$
Degree $d$: $8$
Ramification exponent $e$: $8$
Residue field degree $f$: $1$
Discriminant exponent $c$: $7$
Discriminant root field: $\Q_{5}(\sqrt{5})$
Root number: $1$
$\card{ \Aut(K/\Q_{ 5 }) }$: $4$
This field is not Galois over $\Q_{5}.$
Visible slopes:None

Intermediate fields

$\Q_{5}(\sqrt{5})$, 5.4.3.2

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

Unramified/totally ramified tower

Unramified subfield:$\Q_{5}$
Relative Eisenstein polynomial: \( x^{8} + 5 \) Copy content Toggle raw display

Ramification polygon

Residual polynomials:$z^{7} + 3z^{6} + 3z^{5} + z^{4} + z^{2} + 3z + 3$
Associated inertia:$2$
Indices of inseparability:$[0]$

Invariants of the Galois closure

Galois group:$\OD_{16}$ (as 8T7)
Inertia group:$C_8$ (as 8T1)
Wild inertia group:$C_1$
Unramified degree:$2$
Tame degree:$8$
Wild slopes:None
Galois mean slope:$7/8$
Galois splitting model:$x^{8} + 10 x^{6} + 25 x^{4} + 20 x^{2} + 5$