Defining polynomial
|
$( x^{4} + 8 x^{2} + 10 x + 2 )^{2} + 11$
|
Invariants
| Base field: | $\Q_{11}$ |
| Degree $d$: | $8$ |
| Ramification index $e$: | $2$ |
| Residue field degree $f$: | $4$ |
| Discriminant exponent $c$: | $4$ |
| Discriminant root field: | $\Q_{11}$ |
| Root number: | $-1$ |
| $\Aut(K/\Q_{11})$ $=$ $\Gal(K/\Q_{11})$: | $C_2\times C_4$ |
| This field is Galois and abelian over $\Q_{11}.$ | |
| Visible Artin slopes: | $[\ ]$ |
| Visible Swan slopes: | $[\ ]$ |
| Means: | $\langle\ \rangle$ |
| Rams: | $(\ )$ |
| Jump set: | undefined |
| Roots of unity: | $14640 = (11^{ 4 } - 1)$ |
Intermediate fields
| $\Q_{11}(\sqrt{2})$, $\Q_{11}(\sqrt{11})$, $\Q_{11}(\sqrt{11\cdot 2})$, 11.4.1.0a1.1, 11.2.2.2a1.2, 11.2.2.2a1.1 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Canonical tower
| Unramified subfield: | 11.4.1.0a1.1 $\cong \Q_{11}(t)$ where $t$ is a root of
\( x^{4} + 8 x^{2} + 10 x + 2 \)
|
| Relative Eisenstein polynomial: |
\( x^{2} + 11 \)
$\ \in\Q_{11}(t)[x]$
|
Ramification polygon
| Residual polynomials: | $z + 2$ |
| Associated inertia: | $1$ |
| Indices of inseparability: | $[0]$ |
Invariants of the Galois closure
| Galois degree: | $8$ |
| Galois group: | $C_2\times C_4$ (as 8T2) |
| Inertia group: | Intransitive group isomorphic to $C_2$ |
| Wild inertia group: | $C_1$ |
| Galois unramified degree: | $4$ |
| Galois tame degree: | $2$ |
| Galois Artin slopes: | $[\ ]$ |
| Galois Swan slopes: | $[\ ]$ |
| Galois mean slope: | $0.5$ |
| Galois splitting model: | $x^{8} - 4 x^{7} + 10 x^{6} - 16 x^{5} + 59 x^{4} - 96 x^{3} + 218 x^{2} - 172 x + 463$ |