Defining polynomial
|
\(x^{10} + 20 x^{2} + 5\)
|
Invariants
| Base field: | $\Q_{5}$ |
|
| Degree $d$: | $10$ |
|
| Ramification index $e$: | $10$ |
|
| Residue field degree $f$: | $1$ |
|
| Discriminant exponent $c$: | $11$ |
|
| Discriminant root field: | $\Q_{5}(\sqrt{5})$ | |
| Root number: | $1$ | |
| $\Aut(K/\Q_{5})$: | $C_2$ | |
| This field is not Galois over $\Q_{5}.$ | ||
| Visible Artin slopes: | $[\frac{5}{4}]$ | |
| Visible Swan slopes: | $[\frac{1}{4}]$ | |
| Means: | $\langle\frac{1}{5}\rangle$ | |
| Rams: | $(\frac{1}{2})$ | |
| Jump set: | undefined | |
| Roots of unity: | $4 = (5 - 1)$ |
|
Intermediate fields
| $\Q_{5}(\sqrt{5})$, 5.1.5.5a1.4 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Canonical tower
| Unramified subfield: | $\Q_{5}$ |
|
| Relative Eisenstein polynomial: |
\( x^{10} + 20 x^{2} + 5 \)
|
Ramification polygon
| Residual polynomials: | $z^5 + 2$,$2 z^2 + 2$ |
| Associated inertia: | $1$,$1$ |
| Indices of inseparability: | $[2, 0]$ |
Invariants of the Galois closure
| Galois degree: | $20$ |
| Galois group: | $F_5$ (as 10T4) |
| Inertia group: | $F_5$ (as 10T4) |
| Wild inertia group: | $C_5$ |
| Galois unramified degree: | $1$ |
| Galois tame degree: | $4$ |
| Galois Artin slopes: | $[\frac{5}{4}]$ |
| Galois Swan slopes: | $[\frac{1}{4}]$ |
| Galois mean slope: | $1.15$ |
| Galois splitting model: | $x^{10} + 5 x^{8} + 5 x^{6} - 5 x^{4} - 5 x^{2} - 5$ |