Basic invariants
| Dimension: | $7$ |
| Group: | $C_2^3:(C_7: C_3)$ |
| Conductor: | \(401469235456\)\(\medspace = 2^{8} \cdot 199^{4} \) |
| Frobenius-Schur indicator: | $1$ |
| Root number: | $1$ |
| Artin stem field: | Galois closure of 8.0.401469235456.2 |
| Galois orbit size: | $1$ |
| Smallest permutation container: | $C_2^3:(C_7: C_3)$ |
| Parity: | even |
| Determinant: | 1.1.1t1.a.a |
| Projective image: | $F_8:C_3$ |
| Projective stem field: | Galois closure of 8.0.401469235456.2 |
Defining polynomial
| $f(x)$ | $=$ |
\( x^{8} - 2x^{7} - 4x^{6} + 4x^{5} + 12x^{4} - 16x^{3} + 68x + 52 \)
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The roots of $f$ are computed in an extension of $\Q_{ 13 }$ to precision 10.
Minimal polynomial of a generator $a$ of $K$ over $\mathbb{Q}_{ 13 }$:
\( x^{3} + 2x + 11 \)
Roots:
| $r_{ 1 }$ | $=$ |
\( 3\cdot 13 + 12\cdot 13^{2} + 10\cdot 13^{3} + 5\cdot 13^{4} + 9\cdot 13^{5} + 5\cdot 13^{6} + 9\cdot 13^{7} + 12\cdot 13^{8} + 12\cdot 13^{9} +O(13^{10})\)
|
| $r_{ 2 }$ | $=$ |
\( 9 a^{2} + 10 a + 6 + \left(3 a^{2} + 6 a + 4\right)\cdot 13 + \left(12 a^{2} + 9 a + 1\right)\cdot 13^{2} + \left(10 a + 2\right)\cdot 13^{3} + 12 a^{2} 13^{4} + \left(3 a^{2} + 3 a + 4\right)\cdot 13^{5} + \left(7 a + 9\right)\cdot 13^{6} + \left(7 a^{2} + a + 8\right)\cdot 13^{7} + \left(5 a^{2} + 3 a + 10\right)\cdot 13^{8} + \left(5 a^{2} + 4 a + 8\right)\cdot 13^{9} +O(13^{10})\)
|
| $r_{ 3 }$ | $=$ |
\( 12 a^{2} + a + 6 + \left(3 a^{2} + 9 a + 8\right)\cdot 13 + \left(11 a^{2} + 11 a + 10\right)\cdot 13^{2} + \left(8 a^{2} + 8 a + 5\right)\cdot 13^{3} + \left(9 a^{2} + 7 a + 8\right)\cdot 13^{4} + \left(8 a^{2} + 4\right)\cdot 13^{5} + \left(8 a^{2} + 11\right)\cdot 13^{6} + \left(8 a^{2} + 5 a + 6\right)\cdot 13^{7} + \left(7 a^{2} + 11\right)\cdot 13^{8} + \left(12 a^{2} + 9 a + 10\right)\cdot 13^{9} +O(13^{10})\)
|
| $r_{ 4 }$ | $=$ |
\( a^{2} + 4 a + \left(5 a^{2} + 10\right)\cdot 13 + \left(8 a^{2} + 2 a + 6\right)\cdot 13^{2} + \left(8 a^{2} + 2 a + 5\right)\cdot 13^{3} + \left(9 a^{2} + 6 a + 8\right)\cdot 13^{4} + \left(2 a^{2} + 9\right)\cdot 13^{5} + \left(10 a^{2} + 8 a + 4\right)\cdot 13^{6} + \left(5 a^{2} + 6 a + 7\right)\cdot 13^{7} + \left(6 a^{2} + 3 a + 5\right)\cdot 13^{8} + \left(8 a^{2} + 5\right)\cdot 13^{9} +O(13^{10})\)
|
| $r_{ 5 }$ | $=$ |
\( 11 + 13 + 7\cdot 13^{2} + 4\cdot 13^{3} + 3\cdot 13^{4} + 2\cdot 13^{5} + 7\cdot 13^{6} + 6\cdot 13^{7} + 12\cdot 13^{8} + 12\cdot 13^{9} +O(13^{10})\)
|
| $r_{ 6 }$ | $=$ |
\( 7 a + 7 + \left(8 a^{2} + 10 a + 1\right)\cdot 13 + \left(8 a^{2} + 12 a + 5\right)\cdot 13^{2} + \left(11 a^{2} + 10 a + 3\right)\cdot 13^{3} + \left(12 a^{2} + 4 a + 1\right)\cdot 13^{4} + \left(10 a^{2} + a + 9\right)\cdot 13^{5} + \left(4 a^{2} + 7 a + 6\right)\cdot 13^{6} + \left(6 a^{2} + 4 a + 3\right)\cdot 13^{7} + \left(9 a^{2} + a + 7\right)\cdot 13^{8} + \left(7 a^{2} + 2 a + 7\right)\cdot 13^{9} +O(13^{10})\)
|
| $r_{ 7 }$ | $=$ |
\( 4 a^{2} + 9 a + 8 + \left(a^{2} + 8 a + 5\right)\cdot 13 + \left(5 a^{2} + 3 a\right)\cdot 13^{2} + \left(4 a + 10\right)\cdot 13^{3} + \left(a^{2} + 7 a + 2\right)\cdot 13^{4} + \left(11 a^{2} + 8 a + 9\right)\cdot 13^{5} + \left(7 a^{2} + 11 a + 10\right)\cdot 13^{6} + \left(12 a^{2} + 6 a + 11\right)\cdot 13^{7} + \left(10 a^{2} + 8 a + 4\right)\cdot 13^{8} + \left(12 a^{2} + 6 a + 1\right)\cdot 13^{9} +O(13^{10})\)
|
| $r_{ 8 }$ | $=$ |
\( 8 a + 3 + \left(4 a^{2} + 3 a + 4\right)\cdot 13 + \left(6 a^{2} + 12 a + 8\right)\cdot 13^{2} + \left(8 a^{2} + a + 9\right)\cdot 13^{3} + \left(6 a^{2} + 12 a + 8\right)\cdot 13^{4} + \left(a^{2} + 11 a + 3\right)\cdot 13^{5} + \left(7 a^{2} + 4 a + 9\right)\cdot 13^{6} + \left(11 a^{2} + a + 10\right)\cdot 13^{7} + \left(11 a^{2} + 9 a + 12\right)\cdot 13^{8} + \left(4 a^{2} + 3 a + 4\right)\cdot 13^{9} +O(13^{10})\)
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Generators of the action on the roots $r_1, \ldots, r_{ 8 }$
| Cycle notation |
Character values on conjugacy classes
| Size | Order | Action on $r_1, \ldots, r_{ 8 }$ | Character value |
| $1$ | $1$ | $()$ | $7$ |
| $7$ | $2$ | $(1,7)(2,6)(3,8)(4,5)$ | $-1$ |
| $28$ | $3$ | $(1,8,7)(2,5,6)$ | $1$ |
| $28$ | $3$ | $(1,7,8)(2,6,5)$ | $1$ |
| $28$ | $6$ | $(1,5,7,2,8,6)(3,4)$ | $-1$ |
| $28$ | $6$ | $(1,6,8,2,7,5)(3,4)$ | $-1$ |
| $24$ | $7$ | $(1,6,4,5,8,2,3)$ | $0$ |
| $24$ | $7$ | $(1,5,3,4,2,6,8)$ | $0$ |
The blue line marks the conjugacy class containing complex conjugation.