Basic invariants
Dimension: | $2$ |
Group: | $D_{4}$ |
Conductor: | \(1872\)\(\medspace = 2^{4} \cdot 3^{2} \cdot 13 \) |
Frobenius-Schur indicator: | $1$ |
Root number: | $1$ |
Artin stem field: | Galois closure of 4.2.24336.2 |
Galois orbit size: | $1$ |
Smallest permutation container: | $D_{4}$ |
Parity: | odd |
Determinant: | 1.52.2t1.a.a |
Projective image: | $C_2^2$ |
Projective field: | Galois closure of \(\Q(i, \sqrt{13})\) |
Defining polynomial
$f(x)$ | $=$ | \( x^{4} - 9x^{2} - 9 \) . |
The roots of $f$ are computed in $\Q_{ 17 }$ to precision 6.
Roots:
$r_{ 1 }$ | $=$ | \( 1 + 6\cdot 17 + 15\cdot 17^{2} + 6\cdot 17^{3} + 7\cdot 17^{4} + 13\cdot 17^{5} +O(17^{6})\) |
$r_{ 2 }$ | $=$ | \( 5 + 14\cdot 17 + 12\cdot 17^{2} + 17^{3} + 13\cdot 17^{4} + 10\cdot 17^{5} +O(17^{6})\) |
$r_{ 3 }$ | $=$ | \( 12 + 2\cdot 17 + 4\cdot 17^{2} + 15\cdot 17^{3} + 3\cdot 17^{4} + 6\cdot 17^{5} +O(17^{6})\) |
$r_{ 4 }$ | $=$ | \( 16 + 10\cdot 17 + 17^{2} + 10\cdot 17^{3} + 9\cdot 17^{4} + 3\cdot 17^{5} +O(17^{6})\) |
Generators of the action on the roots $r_1, \ldots, r_{ 4 }$
Cycle notation |
Character values on conjugacy classes
Size | Order | Action on $r_1, \ldots, r_{ 4 }$ | Character value |
$1$ | $1$ | $()$ | $2$ |
$1$ | $2$ | $(1,4)(2,3)$ | $-2$ |
$2$ | $2$ | $(1,2)(3,4)$ | $0$ |
$2$ | $2$ | $(1,4)$ | $0$ |
$2$ | $4$ | $(1,3,4,2)$ | $0$ |
The blue line marks the conjugacy class containing complex conjugation.