Defining polynomial
|
\(x^{7} + 21 x^{5} + 7\)
|
Invariants
| Base field: | $\Q_{7}$ |
| Degree $d$: | $7$ |
| Ramification exponent $e$: | $7$ |
| Residue field degree $f$: | $1$ |
| Discriminant exponent $c$: | $11$ |
| Discriminant root field: | $\Q_{7}(\sqrt{7\cdot 3})$ |
| Root number: | $-i$ |
| $\Aut(K/\Q_{7})$: | $C_1$ |
| This field is not Galois over $\Q_{7}.$ | |
| Visible slopes: | $[11/6]$ |
Intermediate fields
| The extension is primitive: there are no intermediate fields between this field and $\Q_{ 7 }$. |
Unramified/totally ramified tower
| Unramified subfield: | $\Q_{7}$ |
| Relative Eisenstein polynomial: |
\( x^{7} + 21 x^{5} + 7 \)
|
Ramification polygon
Not computedInvariants of the Galois closure
| Galois group: | $F_7$ (as 7T4) |
| Inertia group: | $F_7$ (as 7T4) |
| Wild inertia group: | $C_7$ |
| Unramified degree: | $1$ |
| Tame degree: | $6$ |
| Wild slopes: | $[11/6]$ |
| Galois mean slope: | $1.6904761904761905$ |
| Galois splitting model: | $x^{7} - 14 x^{4} + 7 x^{3} + 28 x^{2} + 21 x + 8$ |