Defining polynomial
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\(x^{15} + 20 x^{2} + 5\)
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Invariants
| Base field: | $\Q_{5}$ |
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| Degree $d$: | $15$ |
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| Ramification index $e$: | $15$ |
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| Residue field degree $f$: | $1$ |
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| Discriminant exponent $c$: | $16$ |
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| Discriminant root field: | $\Q_{5}(\sqrt{2})$ | |
| Root number: | $1$ | |
| $\Aut(K/\Q_{5})$: | $C_1$ | |
| This field is not Galois over $\Q_{5}.$ | ||
| Visible Artin slopes: | $[\frac{7}{6}]$ | |
| Visible Swan slopes: | $[\frac{1}{6}]$ | |
| Means: | $\langle\frac{2}{15}\rangle$ | |
| Rams: | $(\frac{1}{2})$ | |
| Jump set: | undefined | |
| Roots of unity: | $4 = (5 - 1)$ |
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Intermediate fields
| 5.1.3.2a1.1 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Canonical tower
| Unramified subfield: | $\Q_{5}$ |
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| Relative Eisenstein polynomial: |
\( x^{15} + 20 x^{2} + 5 \)
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Ramification polygon
| Residual polynomials: | $z^{10} + 3 z^5 + 3$,$3 z^2 + 2$ |
| Associated inertia: | $2$,$1$ |
| Indices of inseparability: | $[2, 0]$ |
Invariants of the Galois closure
| Galois degree: | $300$ |
| Galois group: | $C_5^2:D_6$ (as 15T18) |
| Inertia group: | $C_5^2:C_6$ (as 15T12) |
| Wild inertia group: | $C_5^2$ |
| Galois unramified degree: | $2$ |
| Galois tame degree: | $6$ |
| Galois Artin slopes: | $[\frac{7}{6}, \frac{7}{6}]$ |
| Galois Swan slopes: | $[\frac{1}{6},\frac{1}{6}]$ |
| Galois mean slope: | $1.1533333333333333$ |
| Galois splitting model: |
$x^{15} - 5 x^{14} - 5 x^{12} + 70 x^{11} + 363 x^{10} - 2655 x^{9} - 780 x^{8} + 28530 x^{7} + 28120 x^{6} - 87272 x^{5} - 215160 x^{4} - 135820 x^{3} + 110840 x^{2} + 111840 x - 45264$
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