Basic invariants
| Dimension: | $7$ |
| Group: | $\PGL(2,7)$ |
| Conductor: | \(21956126976\)\(\medspace = 2^{8} \cdot 3^{6} \cdot 7^{6} \) |
| Frobenius-Schur indicator: | $1$ |
| Root number: | $1$ |
| Artin stem field: | Galois closure of 8.2.153692888832.1 |
| Galois orbit size: | $1$ |
| Smallest permutation container: | 16T713 |
| Parity: | even |
| Determinant: | 1.1.1t1.a.a |
| Projective image: | $\PGL(2,7)$ |
| Projective stem field: | Galois closure of 8.2.153692888832.1 |
Defining polynomial
| $f(x)$ | $=$ |
\( x^{8} - 4x^{7} + 21x^{4} - 18x + 9 \)
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The roots of $f$ are computed in an extension of $\Q_{ 29 }$ to precision 10.
Minimal polynomial of a generator $a$ of $K$ over $\mathbb{Q}_{ 29 }$:
\( x^{3} + 2x + 27 \)
Roots:
| $r_{ 1 }$ | $=$ |
\( 6 + 12\cdot 29 + 10\cdot 29^{2} + 5\cdot 29^{3} + 21\cdot 29^{4} + 23\cdot 29^{5} + 21\cdot 29^{6} + 25\cdot 29^{7} + 19\cdot 29^{8} + 25\cdot 29^{9} +O(29^{10})\)
|
| $r_{ 2 }$ | $=$ |
\( 28 a^{2} + 3 a + \left(27 a^{2} + 6 a + 6\right)\cdot 29 + \left(5 a^{2} + 2 a + 28\right)\cdot 29^{2} + \left(10 a^{2} + 16 a + 24\right)\cdot 29^{3} + \left(21 a^{2} + 28 a + 26\right)\cdot 29^{4} + \left(9 a^{2} + 7 a + 7\right)\cdot 29^{5} + \left(26 a^{2} + 21 a + 9\right)\cdot 29^{6} + \left(24 a^{2} + 12\right)\cdot 29^{7} + \left(14 a^{2} + 3 a + 10\right)\cdot 29^{8} + \left(9 a^{2} + 13 a + 20\right)\cdot 29^{9} +O(29^{10})\)
|
| $r_{ 3 }$ | $=$ |
\( 17 a^{2} + 10 a + 27 + \left(18 a^{2} + a + 23\right)\cdot 29 + \left(14 a^{2} + 14 a + 7\right)\cdot 29^{2} + \left(8 a^{2} + 5 a + 11\right)\cdot 29^{3} + \left(25 a^{2} + 8 a + 2\right)\cdot 29^{4} + \left(18 a^{2} + 20 a + 22\right)\cdot 29^{5} + \left(11 a^{2} + 6 a + 24\right)\cdot 29^{6} + \left(11 a^{2} + 11 a + 4\right)\cdot 29^{7} + \left(21 a^{2} + 8 a + 12\right)\cdot 29^{8} + \left(9 a^{2} + 6 a + 3\right)\cdot 29^{9} +O(29^{10})\)
|
| $r_{ 4 }$ | $=$ |
\( 2 a^{2} + 3 a + 4 + \left(2 a^{2} + 16 a + 10\right)\cdot 29 + \left(13 a^{2} + 9 a + 18\right)\cdot 29^{2} + \left(11 a^{2} + 13 a + 26\right)\cdot 29^{3} + \left(23 a^{2} + 19 a + 19\right)\cdot 29^{4} + \left(15 a^{2} + 5 a + 25\right)\cdot 29^{5} + \left(7 a^{2} + 9 a + 22\right)\cdot 29^{6} + \left(8 a^{2} + 11 a + 28\right)\cdot 29^{7} + \left(a^{2} + 8 a + 1\right)\cdot 29^{8} + \left(2 a^{2} + 14 a + 20\right)\cdot 29^{9} +O(29^{10})\)
|
| $r_{ 5 }$ | $=$ |
\( 28 a^{2} + 23 a + \left(27 a^{2} + 6 a + 6\right)\cdot 29 + \left(9 a^{2} + 17 a + 14\right)\cdot 29^{2} + \left(7 a^{2} + 28 a + 11\right)\cdot 29^{3} + \left(13 a^{2} + 9 a + 6\right)\cdot 29^{4} + \left(3 a^{2} + 15 a + 9\right)\cdot 29^{5} + \left(24 a^{2} + 27 a + 6\right)\cdot 29^{6} + \left(24 a^{2} + 16 a + 12\right)\cdot 29^{7} + \left(12 a^{2} + 17 a + 17\right)\cdot 29^{8} + \left(17 a^{2} + a + 11\right)\cdot 29^{9} +O(29^{10})\)
|
| $r_{ 6 }$ | $=$ |
\( 16 a^{2} + 12 a + 16 + \left(26 a^{2} + a + 5\right)\cdot 29 + \left(25 a^{2} + 19 a + 13\right)\cdot 29^{2} + \left(10 a^{2} + 6 a + 14\right)\cdot 29^{3} + \left(12 a^{2} + 3 a + 4\right)\cdot 29^{4} + \left(19 a + 7\right)\cdot 29^{5} + \left(11 a^{2} + 19 a + 14\right)\cdot 29^{6} + \left(15 a^{2} + 16 a\right)\cdot 29^{7} + \left(20 a^{2} + 18 a + 11\right)\cdot 29^{8} + \left(25 a^{2} + 8 a + 5\right)\cdot 29^{9} +O(29^{10})\)
|
| $r_{ 7 }$ | $=$ |
\( 25 a^{2} + 7 a + 28 + \left(12 a^{2} + 26 a + 25\right)\cdot 29 + \left(17 a^{2} + 24 a + 1\right)\cdot 29^{2} + \left(9 a^{2} + 16 a + 3\right)\cdot 29^{3} + \left(20 a^{2} + 17 a + 15\right)\cdot 29^{4} + \left(9 a^{2} + 18 a + 19\right)\cdot 29^{5} + \left(6 a^{2} + 2 a + 17\right)\cdot 29^{6} + \left(2 a^{2} + a + 21\right)\cdot 29^{7} + \left(16 a^{2} + 2 a + 14\right)\cdot 29^{8} + \left(22 a^{2} + 14 a + 20\right)\cdot 29^{9} +O(29^{10})\)
|
| $r_{ 8 }$ | $=$ |
\( 10 + 26\cdot 29 + 21\cdot 29^{2} + 18\cdot 29^{3} + 19\cdot 29^{4} + 28\cdot 29^{6} + 9\cdot 29^{7} + 28\cdot 29^{8} + 8\cdot 29^{9} +O(29^{10})\)
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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 |
| $1$ | $1$ | $()$ | $7$ |
| $21$ | $2$ | $(1,5)(2,3)(4,8)(6,7)$ | $-1$ |
| $28$ | $2$ | $(2,6)(3,8)(4,5)$ | $-1$ |
| $56$ | $3$ | $(2,5,3)(4,8,6)$ | $1$ |
| $42$ | $4$ | $(1,7,8,4)(2,5,6,3)$ | $-1$ |
| $56$ | $6$ | $(2,8,5,6,3,4)$ | $-1$ |
| $48$ | $7$ | $(1,6,5,2,4,7,8)$ | $0$ |
| $42$ | $8$ | $(1,6,7,3,8,2,4,5)$ | $1$ |
| $42$ | $8$ | $(1,3,4,6,8,5,7,2)$ | $1$ |
The blue line marks the conjugacy class containing complex conjugation.