Defining polynomial
\(x^{14} + 21 x^{3} + 14 x^{2} + 7\) |
Invariants
Base field: | $\Q_{7}$ |
Degree $d$: | $14$ |
Ramification exponent $e$: | $14$ |
Residue field degree $f$: | $1$ |
Discriminant exponent $c$: | $15$ |
Discriminant root field: | $\Q_{7}(\sqrt{7\cdot 3})$ |
Root number: | $-i$ |
$\card{ \Aut(K/\Q_{ 7 }) }$: | $2$ |
This field is not Galois over $\Q_{7}.$ | |
Visible slopes: | $[7/6]$ |
Intermediate fields
$\Q_{7}(\sqrt{7\cdot 3})$, 7.7.7.4 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Unramified/totally ramified tower
Unramified subfield: | $\Q_{7}$ |
Relative Eisenstein polynomial: | \( x^{14} + 21 x^{3} + 14 x^{2} + 7 \) |
Ramification polygon
Residual polynomials: | $2z^{2} + 3$,$z^{7} + 2$ |
Associated inertia: | $1$,$1$ |
Indices of inseparability: | $[2, 0]$ |
Invariants of the Galois closure
Galois group: | $F_7$ (as 14T4) |
Inertia group: | $F_7$ (as 14T4) |
Wild inertia group: | $C_7$ |
Unramified degree: | $1$ |
Tame degree: | $6$ |
Wild slopes: | $[7/6]$ |
Galois mean slope: | $47/42$ |
Galois splitting model: | $x^{14} - 7 x^{13} + 49 x^{12} - 203 x^{11} + 693 x^{10} - 1771 x^{9} + 3787 x^{8} - 6469 x^{7} + 15323 x^{6} - 28833 x^{5} + 30835 x^{4} - 18585 x^{3} + 6251 x^{2} - 1071 x + 72$ |