Defining polynomial
| \( x^{7} + 42 x + 7 \) |
Invariants
| Base field: | $\Q_{7}$ |
| Degree $d$: | $7$ |
| Ramification exponent $e$: | $7$ |
| Residue field degree $f$: | $1$ |
| Discriminant exponent $c$: | $7$ |
| Discriminant root field: | $\Q_{7}(\sqrt{7})$ |
| Root number: | $i$ |
| $|\Aut(K/\Q_{ 7 })|$: | $1$ |
| This field is not Galois over $\Q_{7}.$ | |
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: | \( x^{7} + 42 x + 7 \) |
Invariants of the Galois closure
| Galois group: | $F_7$ (as 7T4) |
| Inertia group: | $F_7$ |
| Unramified degree: | $1$ |
| Tame degree: | $6$ |
| Wild slopes: | [7/6] |
| Galois mean slope: | $47/42$ |
| Galois splitting model: | $x^{7} + 7 x^{5} + 14 x^{3} + 7 x - 1$ |