Defining polynomial
\(x^{4} - 483 x^{2} + 2645\) |
Invariants
Base field: | $\Q_{23}$ |
Degree $d$: | $4$ |
Ramification exponent $e$: | $2$ |
Residue field degree $f$: | $2$ |
Discriminant exponent $c$: | $2$ |
Discriminant root field: | $\Q_{23}(\sqrt{5})$ |
Root number: | $-1$ |
$\card{ \Gal(K/\Q_{ 23 }) }$: | $4$ |
This field is Galois and abelian over $\Q_{23}.$ | |
Visible slopes: | None |
Intermediate fields
$\Q_{23}(\sqrt{5})$ |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Unramified/totally ramified tower
Unramified subfield: | $\Q_{23}(\sqrt{5})$ $\cong \Q_{23}(t)$ where $t$ is a root of \( x^{2} + 21 x + 5 \) |
Relative Eisenstein polynomial: | \( x^{2} + 23 t \) $\ \in\Q_{23}(t)[x]$ |
Ramification polygon
Residual polynomials: | $z + 2$ |
Associated inertia: | $1$ |
Indices of inseparability: | $[0]$ |
Invariants of the Galois closure
Galois group: | $C_4$ (as 4T1) |
Inertia group: | Intransitive group isomorphic to $C_2$ |
Wild inertia group: | $C_1$ |
Unramified degree: | $2$ |
Tame degree: | $2$ |
Wild slopes: | None |
Galois mean slope: | $1/2$ |
Galois splitting model: | $x^{4} - x^{3} - 29 x^{2} + 29 x + 151$ |