Defining polynomial
|
$( x^{4} + 5 x^{2} + 4 x + 3 )^{5} + 7$
|
Invariants
| Base field: | $\Q_{7}$ |
| Degree $d$: | $20$ |
| Ramification index $e$: | $5$ |
| Residue field degree $f$: | $4$ |
| Discriminant exponent $c$: | $16$ |
| Discriminant root field: | $\Q_{7}(\sqrt{3})$ |
| Root number: | $1$ |
| $\Aut(K/\Q_{7})$ $=$$\Gal(K/\Q_{7})$: | $F_5$ |
| This field is Galois over $\Q_{7}.$ | |
| Visible Artin slopes: | $[\ ]$ |
| Visible Swan slopes: | $[\ ]$ |
| Means: | $\langle\ \rangle$ |
| Rams: | $(\ )$ |
| Jump set: | undefined |
| Roots of unity: | $2400 = (7^{ 4 } - 1)$ |
Intermediate fields
| $\Q_{7}(\sqrt{3})$, 7.4.1.0a1.1, 7.1.5.4a1.1 x5, 7.2.5.8a1.1 x5 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Canonical tower
| Unramified subfield: | 7.4.1.0a1.1 $\cong \Q_{7}(t)$ where $t$ is a root of
\( x^{4} + 5 x^{2} + 4 x + 3 \)
|
| Relative Eisenstein polynomial: |
\( x^{5} + 7 \)
$\ \in\Q_{7}(t)[x]$
|
Ramification polygon
| Residual polynomials: | $z^4 + 5 z^3 + 3 z^2 + 3 z + 5$ |
| Associated inertia: | $1$ |
| Indices of inseparability: | $[0]$ |
Invariants of the Galois closure
| Galois degree: | $20$ |
| Galois group: | $F_5$ (as 20T5) |
| Inertia group: | Intransitive group isomorphic to $C_5$ |
| Wild inertia group: | $C_1$ |
| Galois unramified degree: | $4$ |
| Galois tame degree: | $5$ |
| Galois Artin slopes: | $[\ ]$ |
| Galois Swan slopes: | $[\ ]$ |
| Galois mean slope: | $0.8$ |
| Galois splitting model: | not computed |