Defining polynomial
|
\(x^{10} + 20 x^{7} + 10 x^{5} + 50 x^{4} + 100 x^{2} + 25\)
|
Invariants
| Base field: | $\Q_{5}$ |
| Degree $d$: | $10$ |
| Ramification exponent $e$: | $5$ |
| Residue field degree $f$: | $2$ |
| Discriminant exponent $c$: | $12$ |
| Discriminant root field: | $\Q_{5}$ |
| Root number: | $1$ |
| $\card{ \Aut(K/\Q_{ 5 }) }$: | $1$ |
| This field is not Galois over $\Q_{5}.$ | |
| Visible slopes: | $[3/2]$ |
Intermediate fields
| $\Q_{5}(\sqrt{2})$ |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Unramified/totally ramified tower
| Unramified subfield: | $\Q_{5}(\sqrt{2})$ $\cong \Q_{5}(t)$ where $t$ is a root of
\( x^{2} + 4 x + 2 \)
|
| Relative Eisenstein polynomial: |
\( x^{5} + \left(5 t + 20\right) x^{2} + 5 \)
$\ \in\Q_{5}(t)[x]$
|
Ramification polygon
| Residual polynomials: | $z^{2} + 3t + 2$ |
| Associated inertia: | $2$ |
| Indices of inseparability: | $[2, 0]$ |
Invariants of the Galois closure
| Galois group: | $C_5^2:C_8$ (as 10T18) |
| Inertia group: | Intransitive group isomorphic to $C_5:D_5$ |
| Wild inertia group: | $C_5^2$ |
| Unramified degree: | $4$ |
| Tame degree: | $2$ |
| Wild slopes: | $[3/2, 3/2]$ |
| Galois mean slope: | $73/50$ |
| Galois splitting model: | $x^{10} + 20 x^{8} - 40 x^{7} + 90 x^{6} + 664 x^{5} + 3900 x^{4} - 1800 x^{3} - 11775 x^{2} + 120 x - 4208$ |