Defining polynomial
\(x^{7} + 42 x^{6} + 105\) |
Invariants
Base field: | $\Q_{7}$ |
Degree $d$: | $7$ |
Ramification exponent $e$: | $7$ |
Residue field degree $f$: | $1$ |
Discriminant exponent $c$: | $12$ |
Discriminant root field: | $\Q_{7}$ |
Root number: | $1$ |
$\card{ \Gal(K/\Q_{ 7 }) }$: | $7$ |
This field is Galois and abelian over $\Q_{7}.$ | |
Visible slopes: | $[2]$ |
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: | \( x^{7} + 42 x^{6} + 105 \) |
Ramification polygon
Residual polynomials: | $z^{6} + 6$ |
Associated inertia: | $1$ |
Indices of inseparability: | $[6, 0]$ |
Invariants of the Galois closure
Galois group: | $C_7$ (as 7T1) |
Inertia group: | $C_7$ (as 7T1) |
Wild inertia group: | $C_7$ |
Unramified degree: | $1$ |
Tame degree: | $1$ |
Wild slopes: | $[2]$ |
Galois mean slope: | $12/7$ |
Galois splitting model: | $x^{7} - 321069 x^{5} - 19799255 x^{4} + 34199092627 x^{3} + 3786165513760 x^{2} - 1195116149425212 x - 176222689666434431$ |