Defining polynomial
|
\(x^{8} + 8 x^{6} + 2 x^{4} + 4 x^{2} + 8 x + 10\)
|
Invariants
| Base field: | $\Q_{2}$ |
| Degree $d$: | $8$ |
| Ramification exponent $e$: | $8$ |
| Residue field degree $f$: | $1$ |
| Discriminant exponent $c$: | $24$ |
| Discriminant root field: | $\Q_{2}$ |
| Root number: | $1$ |
| $\card{ \Gal(K/\Q_{ 2 }) }$: | $8$ |
| This field is Galois and abelian over $\Q_{2}.$ | |
| Visible slopes: | $[2, 3, 4]$ |
Intermediate fields
| $\Q_{2}(\sqrt{-1})$, $\Q_{2}(\sqrt{-2\cdot 5})$, $\Q_{2}(\sqrt{2\cdot 5})$, 2.4.8.1, 2.4.11.9, 2.4.11.8 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Unramified/totally ramified tower
| Unramified subfield: | $\Q_{2}$ |
| Relative Eisenstein polynomial: |
\( x^{8} + 8 x^{6} + 2 x^{4} + 4 x^{2} + 8 x + 10 \)
|
Ramification polygon
Not computedInvariants of the Galois closure
| Galois group: | $C_2\times C_4$ (as 8T2) |
| Inertia group: | $C_2\times C_4$ (as 8T2) |
| Wild inertia group: | $C_2\times C_4$ |
| Unramified degree: | $1$ |
| Tame degree: | $1$ |
| Wild slopes: | $[2, 3, 4]$ |
| Galois mean slope: | $3$ |
| Galois splitting model: | $x^{8} - 40 x^{4} + 625$ |