Basic invariants
Dimension: | $7$ |
Group: | $\GL(3,2)$ |
Conductor: | \(82653950016\)\(\medspace = 2^{6} \cdot 3^{6} \cdot 11^{6} \) |
Frobenius-Schur indicator: | $1$ |
Root number: | $1$ |
Artin stem field: | Galois closure of 7.3.9183772224.1 |
Galois orbit size: | $1$ |
Smallest permutation container: | $\PSL(2,7)$ |
Parity: | even |
Determinant: | 1.1.1t1.a.a |
Projective image: | $\GL(3,2)$ |
Projective stem field: | Galois closure of 7.3.9183772224.1 |
Defining polynomial
$f(x)$ | $=$ | \( x^{7} - x^{6} - 9x^{5} - x^{4} + 19x^{3} + 21x^{2} - 23x - 13 \) . |
The roots of $f$ are computed in an extension of $\Q_{ 13 }$ to precision 8.
Minimal polynomial of a generator $a$ of $K$ over $\mathbb{Q}_{ 13 }$: \( x^{3} + 2x + 11 \)
Roots:
$r_{ 1 }$ | $=$ | \( 9\cdot 13 + 6\cdot 13^{2} + 4\cdot 13^{3} + 12\cdot 13^{4} + 7\cdot 13^{6} + 9\cdot 13^{7} +O(13^{8})\) |
$r_{ 2 }$ | $=$ | \( 10 a^{2} + 8 a + 2 + \left(11 a^{2} + 6\right)\cdot 13 + \left(7 a^{2} + 2 a + 2\right)\cdot 13^{2} + \left(6 a^{2} + 9 a + 5\right)\cdot 13^{3} + \left(7 a^{2} + 4 a + 5\right)\cdot 13^{4} + \left(12 a^{2} + 3 a + 12\right)\cdot 13^{5} + \left(5 a^{2} + 4 a + 9\right)\cdot 13^{6} + \left(5 a^{2} + 7 a + 1\right)\cdot 13^{7} +O(13^{8})\) |
$r_{ 3 }$ | $=$ | \( 6 a^{2} + 7 a + 11 + \left(3 a^{2} + 7 a + 6\right)\cdot 13 + \left(a^{2} + 2 a + 7\right)\cdot 13^{2} + \left(a^{2} + 6 a + 3\right)\cdot 13^{3} + \left(10 a^{2} + a + 5\right)\cdot 13^{4} + \left(a + 9\right)\cdot 13^{5} + \left(2 a^{2} + 8 a + 2\right)\cdot 13^{6} + \left(2 a^{2} + 7 a + 5\right)\cdot 13^{7} +O(13^{8})\) |
$r_{ 4 }$ | $=$ | \( 12 a^{2} + 7 a + 9 + \left(2 a^{2} + a + 11\right)\cdot 13 + \left(2 a^{2} + 9 a + 7\right)\cdot 13^{2} + \left(7 a^{2} + 1\right)\cdot 13^{3} + \left(a^{2} + 5 a + 6\right)\cdot 13^{4} + \left(5 a^{2} + 7 a + 2\right)\cdot 13^{5} + \left(7 a^{2} + 6 a + 3\right)\cdot 13^{6} + \left(8 a^{2} + 6 a + 10\right)\cdot 13^{7} +O(13^{8})\) |
$r_{ 5 }$ | $=$ | \( 7 a^{2} + 2 a + 8 + \left(4 a^{2} + 10 a + 12\right)\cdot 13 + \left(2 a^{2} + a + 8\right)\cdot 13^{2} + \left(4 a^{2} + 4 a + 7\right)\cdot 13^{3} + \left(10 a^{2} + 8 a + 5\right)\cdot 13^{4} + \left(2 a^{2} + 11 a + 3\right)\cdot 13^{5} + \left(12 a^{2} + 10 a + 3\right)\cdot 13^{6} + \left(11 a^{2} + 8 a + 5\right)\cdot 13^{7} +O(13^{8})\) |
$r_{ 6 }$ | $=$ | \( 4 a + 3 + \left(5 a^{2} + 8 a\right)\cdot 13 + \left(9 a^{2} + 8 a + 1\right)\cdot 13^{2} + \left(7 a^{2} + 2 a + 8\right)\cdot 13^{3} + \left(5 a^{2} + 3 a + 3\right)\cdot 13^{4} + \left(9 a^{2} + 12\right)\cdot 13^{5} + \left(11 a^{2} + 7 a + 6\right)\cdot 13^{6} + \left(11 a^{2} + 9 a + 9\right)\cdot 13^{7} +O(13^{8})\) |
$r_{ 7 }$ | $=$ | \( 4 a^{2} + 11 a + 7 + \left(11 a^{2} + 10 a + 5\right)\cdot 13 + \left(2 a^{2} + a + 4\right)\cdot 13^{2} + \left(12 a^{2} + 3 a + 8\right)\cdot 13^{3} + \left(3 a^{2} + 3 a\right)\cdot 13^{4} + \left(8 a^{2} + 2 a + 11\right)\cdot 13^{5} + \left(12 a^{2} + 2 a + 5\right)\cdot 13^{6} + \left(11 a^{2} + 12 a + 10\right)\cdot 13^{7} +O(13^{8})\) |
Generators of the action on the roots $r_1, \ldots, r_{ 7 }$
Cycle notation |
Character values on conjugacy classes
Size | Order | Action on $r_1, \ldots, r_{ 7 }$ | Character value |
$1$ | $1$ | $()$ | $7$ |
$21$ | $2$ | $(2,7)(3,5)$ | $-1$ |
$56$ | $3$ | $(2,4,7)(3,6,5)$ | $1$ |
$42$ | $4$ | $(1,5)(2,3,4,6)$ | $-1$ |
$24$ | $7$ | $(1,3,4,6,7,2,5)$ | $0$ |
$24$ | $7$ | $(1,6,5,4,2,3,7)$ | $0$ |
The blue line marks the conjugacy class containing complex conjugation.