Defining polynomial
|
\(x^{12} + 8 x^{8} + 8 x^{7} + 8 x^{5} + 8 x^{2} + 8 x + 10\)
|
Invariants
| Base field: | $\Q_{2}$ |
| Degree $d$: | $12$ |
| Ramification exponent $e$: | $12$ |
| Residue field degree $f$: | $1$ |
| Discriminant exponent $c$: | $35$ |
| Discriminant root field: | $\Q_{2}(\sqrt{-2})$ |
| Root number: | $-i$ |
| $\card{ \Aut(K/\Q_{ 2 }) }$: | $2$ |
| This field is not Galois over $\Q_{2}.$ | |
| Visible slopes: | $[3, 4]$ |
Intermediate fields
| $\Q_{2}(\sqrt{-2\cdot 5})$, 2.3.2.1, 2.6.11.13 |
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: |
\( x^{12} + 8 x^{8} + 8 x^{7} + 8 x^{5} + 8 x^{2} + 8 x + 10 \)
|
Ramification polygon
| Residual polynomials: | $z + 1$,$z^{2} + 1$,$z^{8} + z^{4} + 1$ |
| Associated inertia: | $1$,$1$,$2$ |
| Indices of inseparability: | $[24, 12, 0]$ |
Invariants of the Galois closure
| Galois group: | $C_2^4:D_{12}$ (as 12T154) |
| Inertia group: | $C_2^4:C_{12}$ (as 12T105) |
| Wild inertia group: | $C_2^4:C_4$ |
| Unramified degree: | $2$ |
| Tame degree: | $3$ |
| Wild slopes: | $[8/3, 8/3, 3, 23/6, 23/6, 4]$ |
| Galois mean slope: | $361/96$ |
| Galois splitting model: | $x^{12} + 4 x^{10} - 4 x^{8} - 44 x^{6} - 62 x^{4} - 20 x^{2} - 2$ |