Defining polynomial
|
$( x^{2} + 2 x + 2 )^{2} + 3$
|
Invariants
| Base field: | $\Q_{3}$ |
| Degree $d$: | $4$ |
| Ramification index $e$: | $2$ |
| Residue field degree $f$: | $2$ |
| Discriminant exponent $c$: | $2$ |
| Discriminant root field: | $\Q_{3}$ |
| Root number: | $1$ |
| $\Aut(K/\Q_{3})$ $=$ $\Gal(K/\Q_{3})$: | $C_2^2$ |
| This field is Galois and abelian over $\Q_{3}.$ | |
| Visible Artin slopes: | $[\ ]$ |
| Visible Swan slopes: | $[\ ]$ |
| Means: | $\langle\ \rangle$ |
| Rams: | $(\ )$ |
| Jump set: | $[1]$ |
| Roots of unity: | $24 = (3^{ 2 } - 1) \cdot 3$ |
Intermediate fields
| $\Q_{3}(\sqrt{3})$, $\Q_{3}(\sqrt{3\cdot 2})$, $\Q_{3}(\sqrt{2})$ |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Canonical tower
| Unramified subfield: | $\Q_{3}(\sqrt{2})$ $\cong \Q_{3}(t)$ where $t$ is a root of
\( x^{2} + 2 x + 2 \)
|
| Relative Eisenstein polynomial: |
\( x^{2} + 3 \)
$\ \in\Q_{3}(t)[x]$
|
Ramification polygon
| Residual polynomials: | $z + 2$ |
| Associated inertia: | $1$ |
| Indices of inseparability: | $[0]$ |
Invariants of the Galois closure
| Galois degree: | $4$ |
| Galois group: | $C_2^2$ (as 4T2) |
| Inertia group: | Intransitive group isomorphic to $C_2$ |
| Wild inertia group: | $C_1$ |
| Galois unramified degree: | $2$ |
| Galois tame degree: | $2$ |
| Galois Artin slopes: | $[\ ]$ |
| Galois Swan slopes: | $[\ ]$ |
| Galois mean slope: | $0.5$ |
| Galois splitting model: | $x^{4} - 2 x^{3} - x^{2} + 2 x + 22$ |