Basic invariants
| Dimension: | $4$ |
| Group: | $Q_8:S_4$ |
| Conductor: | \(87616\)\(\medspace = 2^{6} \cdot 37^{2} \) |
| Frobenius-Schur indicator: | $1$ |
| Root number: | $1$ |
| Artin stem field: | Galois closure of 8.0.51868672.1 |
| Galois orbit size: | $1$ |
| Smallest permutation container: | $Q_8:S_4$ |
| Parity: | even |
| Determinant: | 1.1.1t1.a.a |
| Projective image: | $C_2^2:S_4$ |
| Projective stem field: | Galois closure of 8.4.656825960704.2 |
Defining polynomial
| $f(x)$ | $=$ |
\( x^{8} - 2x^{7} + 4x^{5} - 4x^{3} + 2x + 1 \)
|
The roots of $f$ are computed in an extension of $\Q_{ 31 }$ to precision 10.
Minimal polynomial of a generator $a$ of $K$ over $\mathbb{Q}_{ 31 }$:
\( x^{2} + 29x + 3 \)
Roots:
| $r_{ 1 }$ | $=$ |
\( 10 a + 17 + \left(28 a + 17\right)\cdot 31 + \left(6 a + 7\right)\cdot 31^{2} + \left(23 a + 21\right)\cdot 31^{3} + \left(13 a + 11\right)\cdot 31^{4} + \left(4 a + 4\right)\cdot 31^{5} + \left(30 a + 14\right)\cdot 31^{6} + 17 a\cdot 31^{7} + \left(3 a + 3\right)\cdot 31^{8} + \left(5 a + 30\right)\cdot 31^{9} +O(31^{10})\)
|
| $r_{ 2 }$ | $=$ |
\( 27 + 27\cdot 31 + 26\cdot 31^{2} + 23\cdot 31^{3} + 4\cdot 31^{4} + 18\cdot 31^{5} + 2\cdot 31^{6} + 18\cdot 31^{7} + 19\cdot 31^{8} + 10\cdot 31^{9} +O(31^{10})\)
|
| $r_{ 3 }$ | $=$ |
\( 8 + 17\cdot 31 + 25\cdot 31^{2} + 3\cdot 31^{3} + 21\cdot 31^{4} + 8\cdot 31^{5} + 17\cdot 31^{6} + 20\cdot 31^{7} + 15\cdot 31^{8} + 6\cdot 31^{9} +O(31^{10})\)
|
| $r_{ 4 }$ | $=$ |
\( 21 a + 6 + \left(2 a + 2\right)\cdot 31 + \left(24 a + 24\right)\cdot 31^{2} + \left(7 a + 29\right)\cdot 31^{3} + \left(17 a + 15\right)\cdot 31^{4} + \left(26 a + 30\right)\cdot 31^{5} + 7\cdot 31^{6} + \left(13 a + 6\right)\cdot 31^{7} + \left(27 a + 23\right)\cdot 31^{8} + \left(25 a + 5\right)\cdot 31^{9} +O(31^{10})\)
|
| $r_{ 5 }$ | $=$ |
\( 22 a + 8 + \left(a + 12\right)\cdot 31 + \left(27 a + 19\right)\cdot 31^{2} + \left(26 a + 20\right)\cdot 31^{3} + \left(6 a + 23\right)\cdot 31^{4} + \left(6 a + 9\right)\cdot 31^{5} + \left(9 a + 25\right)\cdot 31^{6} + \left(11 a + 28\right)\cdot 31^{7} + \left(27 a + 16\right)\cdot 31^{8} + \left(17 a + 3\right)\cdot 31^{9} +O(31^{10})\)
|
| $r_{ 6 }$ | $=$ |
\( 5 a + 30 + \left(14 a + 14\right)\cdot 31 + \left(17 a + 10\right)\cdot 31^{2} + \left(16 a + 27\right)\cdot 31^{3} + \left(11 a + 14\right)\cdot 31^{4} + \left(4 a + 4\right)\cdot 31^{5} + \left(20 a + 7\right)\cdot 31^{6} + \left(2 a + 11\right)\cdot 31^{7} + \left(12 a + 28\right)\cdot 31^{8} + \left(19 a + 29\right)\cdot 31^{9} +O(31^{10})\)
|
| $r_{ 7 }$ | $=$ |
\( 9 a + 21 + \left(29 a + 24\right)\cdot 31 + \left(3 a + 9\right)\cdot 31^{2} + \left(4 a + 16\right)\cdot 31^{3} + \left(24 a + 10\right)\cdot 31^{4} + \left(24 a + 15\right)\cdot 31^{5} + \left(21 a + 6\right)\cdot 31^{6} + \left(19 a + 11\right)\cdot 31^{7} + \left(3 a + 29\right)\cdot 31^{8} + \left(13 a + 11\right)\cdot 31^{9} +O(31^{10})\)
|
| $r_{ 8 }$ | $=$ |
\( 26 a + 9 + \left(16 a + 7\right)\cdot 31 + 13 a\cdot 31^{2} + \left(14 a + 12\right)\cdot 31^{3} + \left(19 a + 21\right)\cdot 31^{4} + \left(26 a + 1\right)\cdot 31^{5} + \left(10 a + 12\right)\cdot 31^{6} + \left(28 a + 27\right)\cdot 31^{7} + \left(18 a + 18\right)\cdot 31^{8} + \left(11 a + 25\right)\cdot 31^{9} +O(31^{10})\)
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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 |
| $1$ | $1$ | $()$ | $4$ |
| $1$ | $2$ | $(1,4)(2,3)(5,8)(6,7)$ | $-4$ |
| $6$ | $2$ | $(2,3)(6,7)$ | $0$ |
| $12$ | $2$ | $(1,5)(2,7)(3,6)(4,8)$ | $0$ |
| $24$ | $2$ | $(2,7)(3,6)(5,8)$ | $0$ |
| $32$ | $3$ | $(1,7,8)(4,6,5)$ | $1$ |
| $6$ | $4$ | $(1,5,4,8)(2,6,3,7)$ | $0$ |
| $6$ | $4$ | $(1,8,4,5)(2,6,3,7)$ | $0$ |
| $12$ | $4$ | $(2,7,3,6)$ | $2$ |
| $12$ | $4$ | $(1,8,4,5)(2,3)(6,7)$ | $-2$ |
| $32$ | $6$ | $(1,8,2,4,5,3)(6,7)$ | $-1$ |
| $24$ | $8$ | $(1,3,8,7,4,2,5,6)$ | $0$ |
| $24$ | $8$ | $(1,7,3,5,4,6,2,8)$ | $0$ |
The blue line marks the conjugacy class containing complex conjugation.