Defining polynomial
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\(x^{12} + 6 x^{11} + 21 x^{10} + 50 x^{9} + 90 x^{8} + 130 x^{7} + 159 x^{6} + 132 x^{5} + 10 x^{4} - 100 x^{3} - 53 x^{2} + 22 x + 19\)
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Invariants
| Base field: | $\Q_{2}$ |
| Degree $d$: | $12$ |
| Ramification exponent $e$: | $6$ |
| Residue field degree $f$: | $2$ |
| Discriminant exponent $c$: | $12$ |
| Discriminant root field: | $\Q_{2}$ |
| Root number: | $1$ |
| $\card{ \Aut(K/\Q_{ 2 }) }$: | $4$ |
| This field is not Galois over $\Q_{2}.$ | |
| Visible slopes: | $[4/3]$ |
Intermediate fields
| $\Q_{2}(\sqrt{5})$, 2.3.2.1 x3, 2.6.4.1, 2.6.6.7, 2.6.6.8 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Unramified/totally ramified tower
| Unramified subfield: | $\Q_{2}(\sqrt{5})$ $\cong \Q_{2}(t)$ where $t$ is a root of
\( x^{2} + x + 1 \)
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| Relative Eisenstein polynomial: |
\( x^{6} + 2 x + 2 \)
$\ \in\Q_{2}(t)[x]$
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Ramification polygon
| Residual polynomials: | $z + 1$,$z^{4} + z^{2} + 1$ |
| Associated inertia: | $1$,$1$ |
| Indices of inseparability: | $[1, 0]$ |
Invariants of the Galois closure
| Galois group: | $S_4$ (as 12T9) |
| Inertia group: | Intransitive group isomorphic to $A_4$ |
| Wild inertia group: | $C_2^2$ |
| Unramified degree: | $2$ |
| Tame degree: | $3$ |
| Wild slopes: | $[4/3, 4/3]$ |
| Galois mean slope: | $7/6$ |
| Galois splitting model: |
$x^{12} - 4 x^{11} + x^{10} + 14 x^{9} - 14 x^{8} - 10 x^{7} + 25 x^{6} - 10 x^{5} - 14 x^{4} + 14 x^{3} + x^{2} - 4 x + 1$
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