Defining polynomial
\(x^{9} - 3 x^{7} + 9 x^{6} - 9 x^{5} - 18 x^{4} + 81 x^{3} - 27 x^{2} - 27 x + 27\) |
Invariants
Base field: | $\Q_{3}$ |
Degree $d$: | $9$ |
Ramification exponent $e$: | $3$ |
Residue field degree $f$: | $3$ |
Discriminant exponent $c$: | $9$ |
Discriminant root field: | $\Q_{3}(\sqrt{3})$ |
Root number: | $i$ |
$\card{ \Aut(K/\Q_{ 3 }) }$: | $1$ |
This field is not Galois over $\Q_{3}.$ | |
Visible slopes: | $[3/2]$ |
Intermediate fields
3.3.0.1 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Unramified/totally ramified tower
Unramified subfield: | 3.3.0.1 $\cong \Q_{3}(t)$ where $t$ is a root of \( x^{3} + 2 x + 1 \) |
Relative Eisenstein polynomial: | \( x^{3} + \left(3 t^{2} + 3\right) x + 3 \) $\ \in\Q_{3}(t)[x]$ |
Ramification polygon
Residual polynomials: | $z + 2t^{2} + 2$ |
Associated inertia: | $1$ |
Indices of inseparability: | $[1, 0]$ |
Invariants of the Galois closure
Galois group: | $C_3^2:C_6$ (as 9T13) |
Inertia group: | Intransitive group isomorphic to $C_3:S_3$ |
Wild inertia group: | $C_3^2$ |
Unramified degree: | $3$ |
Tame degree: | $2$ |
Wild slopes: | $[3/2, 3/2]$ |
Galois mean slope: | $25/18$ |
Galois splitting model: | $x^{9} + 6 x^{7} - x^{6} - 9 x^{5} + 45 x^{4} - 57 x^{3} + 108 x^{2} - 123 x + 43$ |