Properties

Label 71.4.2.1
Base \(\Q_{71}\)
Degree \(4\)
e \(2\)
f \(2\)
c \(2\)
Galois group $C_2^2$ (as 4T2)

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Defining polynomial

\(x^{4} + 1491 x^{2} + 609961\)  Toggle raw display

Invariants

Base field: $\Q_{71}$
Degree $d$: $4$
Ramification exponent $e$: $2$
Residue field degree $f$: $2$
Discriminant exponent $c$: $2$
Discriminant root field: $\Q_{71}$
Root number: $1$
$|\Gal(K/\Q_{ 71 })|$: $4$
This field is Galois and abelian over $\Q_{71}.$

Intermediate fields

$\Q_{71}(\sqrt{7})$, $\Q_{71}(\sqrt{71})$, $\Q_{71}(\sqrt{71\cdot 7})$

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

Unramified/totally ramified tower

Unramified subfield:$\Q_{71}(\sqrt{7})$ $\cong \Q_{71}(t)$ where $t$ is a root of \( x^{2} - x + 11 \)  Toggle raw display
Relative Eisenstein polynomial:\( x^{2} - 71 t^{2} \)$\ \in\Q_{71}(t)[x]$  Toggle raw display

Invariants of the Galois closure

Galois group:$C_2^2$ (as 4T2)
Inertia group:Intransitive group isomorphic to $C_2$
Unramified degree:$2$
Tame degree:$2$
Wild slopes:None
Galois mean slope:$1/2$
Galois splitting model:$x^{4} + 1491 x^{2} + 609961$  Toggle raw display