Basic invariants
| Dimension: | $2$ |
| Group: | $D_{4}$ |
| Conductor: | \(15975\)\(\medspace = 3^{2} \cdot 5^{2} \cdot 71 \) |
| Frobenius-Schur indicator: | $1$ |
| Root number: | $1$ |
| Artin stem field: | Galois closure of 4.0.5671125.1 |
| Galois orbit size: | $1$ |
| Smallest permutation container: | $D_{4}$ |
| Parity: | odd |
| Determinant: | 1.71.2t1.a.a |
| Projective image: | $C_2^2$ |
| Projective field: | Galois closure of \(\Q(\sqrt{5}, \sqrt{-71})\) |
Defining polynomial
| $f(x)$ | $=$ |
\( x^{4} - 2x^{3} - 6x^{2} + 7x + 811 \)
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The roots of $f$ are computed in $\Q_{ 19 }$ to precision 6.
Roots:
| $r_{ 1 }$ | $=$ |
\( 6 + 10\cdot 19 + 10\cdot 19^{2} + 18\cdot 19^{3} + 11\cdot 19^{4} + 10\cdot 19^{5} +O(19^{6})\)
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| $r_{ 2 }$ | $=$ |
\( 9 + 10\cdot 19 + 19^{2} + 9\cdot 19^{3} + 7\cdot 19^{4} + 11\cdot 19^{5} +O(19^{6})\)
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| $r_{ 3 }$ | $=$ |
\( 11 + 8\cdot 19 + 17\cdot 19^{2} + 9\cdot 19^{3} + 11\cdot 19^{4} + 7\cdot 19^{5} +O(19^{6})\)
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| $r_{ 4 }$ | $=$ |
\( 14 + 8\cdot 19 + 8\cdot 19^{2} + 7\cdot 19^{4} + 8\cdot 19^{5} +O(19^{6})\)
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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.