Defining polynomial
|
$( x^{2} + 16 x + 3 )^{9} + 17 x + 238$
|
Invariants
| Base field: | $\Q_{17}$ |
|
| Degree $d$: | $18$ |
|
| Ramification index $e$: | $9$ |
|
| Residue field degree $f$: | $2$ |
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| Discriminant exponent $c$: | $16$ |
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| Discriminant root field: | $\Q_{17}(\sqrt{3})$ | |
| Root number: | $1$ | |
| $\Aut(K/\Q_{17})$: | $C_9$ | |
| This field is not Galois over $\Q_{17}.$ | ||
| Visible Artin slopes: | $[\ ]$ | |
| Visible Swan slopes: | $[\ ]$ | |
| Means: | $\langle\ \rangle$ | |
| Rams: | $(\ )$ | |
| Jump set: | undefined | |
| Roots of unity: | $288 = (17^{ 2 } - 1)$ |
|
Intermediate fields
| $\Q_{17}(\sqrt{3})$, 17.2.3.4a1.1 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Canonical tower
| Unramified subfield: | $\Q_{17}(\sqrt{3})$ $\cong \Q_{17}(t)$ where $t$ is a root of
\( x^{2} + 16 x + 3 \)
|
|
| Relative Eisenstein polynomial: |
\( x^{9} + 221 t + 51 \)
$\ \in\Q_{17}(t)[x]$
|
Ramification polygon
| Residual polynomials: | $z^8 + 9 z^7 + 2 z^6 + 16 z^5 + 7 z^4 + 7 z^3 + 16 z^2 + 2 z + 9$ |
| Associated inertia: | $1$ |
| Indices of inseparability: | $[0]$ |
Invariants of the Galois closure
| Galois degree: | $162$ |
| Galois group: | $C_9\times D_9$ (as 18T74) |
| Inertia group: | Intransitive group isomorphic to $C_9$ |
| Wild inertia group: | $C_1$ |
| Galois unramified degree: | $18$ |
| Galois tame degree: | $9$ |
| Galois Artin slopes: | $[\ ]$ |
| Galois Swan slopes: | $[\ ]$ |
| Galois mean slope: | $0.8888888888888888$ |
| Galois splitting model: | not computed |