Defining polynomial
\(x^{14} + 14 x^{13} + 98 x^{12} + 400 x^{11} + 956 x^{10} + 1160 x^{9} + 152 x^{8} - 320 x^{7} + 5296 x^{6} + 6432 x^{5} - 11936 x^{4} + 21504 x^{3} + 2368 x^{2} - 13440 x + 16512\) |
Invariants
Base field: | $\Q_{2}$ |
Degree $d$: | $14$ |
Ramification exponent $e$: | $2$ |
Residue field degree $f$: | $7$ |
Discriminant exponent $c$: | $14$ |
Discriminant root field: | $\Q_{2}$ |
Root number: | $-1$ |
$\card{ \Aut(K/\Q_{ 2 }) }$: | $2$ |
This field is not Galois over $\Q_{2}.$ | |
Visible slopes: | $[2]$ |
Intermediate fields
2.7.0.1 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Unramified/totally ramified tower
Unramified subfield: | 2.7.0.1 $\cong \Q_{2}(t)$ where $t$ is a root of \( x^{7} + x + 1 \) |
Relative Eisenstein polynomial: | \( x^{2} + \left(2 t^{4} + 2 t^{2} + 2\right) x + 4 t^{6} + 2 \) $\ \in\Q_{2}(t)[x]$ |
Ramification polygon
Residual polynomials: | $z + t^{4} + t^{2} + 1$ |
Associated inertia: | $1$ |
Indices of inseparability: | $[1, 0]$ |
Invariants of the Galois closure
Galois group: | $C_2^3:F_8$ (as 14T21) |
Inertia group: | Intransitive group isomorphic to $C_2^6$ |
Wild inertia group: | $C_2^6$ |
Unramified degree: | $7$ |
Tame degree: | $1$ |
Wild slopes: | $[2, 2, 2, 2, 2, 2]$ |
Galois mean slope: | $63/32$ |
Galois splitting model: | $x^{14} - 7 x^{12} - 28 x^{10} + 210 x^{8} - 14 x^{6} - 168 x^{4} + 56 x^{2} - 1$ |