Basic invariants
| Dimension: | $2$ |
| Group: | $D_{5}$ |
| Conductor: | \(803\)\(\medspace = 11 \cdot 73 \) |
| Frobenius-Schur indicator: | $1$ |
| Root number: | $1$ |
| Artin stem field: | Galois closure of 5.1.644809.1 |
| Galois orbit size: | $2$ |
| Smallest permutation container: | $D_{5}$ |
| Parity: | odd |
| Determinant: | 1.803.2t1.a.a |
| Projective image: | $D_5$ |
| Projective stem field: | Galois closure of 5.1.644809.1 |
Defining polynomial
| $f(x)$ | $=$ |
\( x^{5} - x^{4} + 2x^{3} - 19x^{2} + 33x - 20 \)
|
The roots of $f$ are computed in an extension of $\Q_{ 19 }$ to precision 5.
Minimal polynomial of a generator $a$ of $K$ over $\mathbb{Q}_{ 19 }$:
\( x^{2} + 18x + 2 \)
Roots:
| $r_{ 1 }$ | $=$ |
\( 17 a + 14 + \left(17 a + 18\right)\cdot 19 + \left(2 a + 17\right)\cdot 19^{2} + \left(16 a + 18\right)\cdot 19^{3} + \left(3 a + 17\right)\cdot 19^{4} +O(19^{5})\)
|
| $r_{ 2 }$ | $=$ |
\( 18 + 7\cdot 19 + 8\cdot 19^{2} + 12\cdot 19^{3} + 7\cdot 19^{4} +O(19^{5})\)
|
| $r_{ 3 }$ | $=$ |
\( 2 a + 12 + a\cdot 19 + \left(16 a + 3\right)\cdot 19^{2} + \left(2 a + 13\right)\cdot 19^{3} + \left(15 a + 5\right)\cdot 19^{4} +O(19^{5})\)
|
| $r_{ 4 }$ | $=$ |
\( 10 a + 2 + \left(9 a + 15\right)\cdot 19 + \left(a + 17\right)\cdot 19^{2} + \left(7 a + 12\right)\cdot 19^{3} + \left(2 a + 5\right)\cdot 19^{4} +O(19^{5})\)
|
| $r_{ 5 }$ | $=$ |
\( 9 a + 12 + \left(9 a + 14\right)\cdot 19 + \left(17 a + 9\right)\cdot 19^{2} + \left(11 a + 18\right)\cdot 19^{3} + 16 a\cdot 19^{4} +O(19^{5})\)
|
Generators of the action on the roots $r_1, \ldots, r_{ 5 }$
| Cycle notation |
Character values on conjugacy classes
| Size | Order | Action on $r_1, \ldots, r_{ 5 }$ | Character value |
| $1$ | $1$ | $()$ | $2$ |
| $5$ | $2$ | $(1,4)(2,3)$ | $0$ |
| $2$ | $5$ | $(1,2,3,4,5)$ | $-\zeta_{5}^{3} - \zeta_{5}^{2} - 1$ |
| $2$ | $5$ | $(1,3,5,2,4)$ | $\zeta_{5}^{3} + \zeta_{5}^{2}$ |
The blue line marks the conjugacy class containing complex conjugation.