Defining polynomial
|
\(x^{7} + 2 x^{2} + 1\)
|
Invariants
| Base field: | $\Q_{3}$ |
| Degree $d$: | $7$ |
| Ramification index $e$: | $1$ |
| Residue field degree $f$: | $7$ |
| Discriminant exponent $c$: | $0$ |
| Discriminant root field: | $\Q_{3}$ |
| Root number: | $1$ |
| $\Aut(K/\Q_{3})$ $=$$\Gal(K/\Q_{3})$: | $C_7$ |
| This field is Galois and abelian over $\Q_{3}.$ | |
| Visible Artin slopes: | $[\ ]$ |
| Visible Swan slopes: | $[\ ]$ |
| Means: | $\langle\ \rangle$ |
| Rams: | $(\ )$ |
| Jump set: | undefined |
| Roots of unity: | $2186 = (3^{ 7 } - 1)$ |
Intermediate fields
| The extension is primitive: there are no intermediate fields between this field and $\Q_{ 3 }$. |
Canonical tower
| Unramified subfield: | 3.7.1.0a1.1 $\cong \Q_{3}(t)$ where $t$ is a root of
\( x^{7} + 2 x^{2} + 1 \)
|
| Relative Eisenstein polynomial: |
\( x - 3 \)
$\ \in\Q_{3}(t)[x]$
|
Ramification polygon
The ramification polygon is trivial for unramified extensions.
Invariants of the Galois closure
| Galois degree: | $7$ |
| Galois group: | $C_7$ (as 7T1) |
| Inertia group: | trivial |
| Wild inertia group: | $C_1$ |
| Galois unramified degree: | $7$ |
| Galois tame degree: | $1$ |
| Galois Artin slopes: | $[\ ]$ |
| Galois Swan slopes: | $[\ ]$ |
| Galois mean slope: | $0.0$ |
| Galois splitting model: | $x^{7} - x^{6} - 12 x^{5} + 7 x^{4} + 28 x^{3} - 14 x^{2} - 9 x - 1$ |