Basic invariants
| Dimension: | $4$ |
| Group: | $C_3^2:D_4$ |
| Conductor: | \(20975\)\(\medspace = 5^{2} \cdot 839 \) |
| Frobenius-Schur indicator: | $1$ |
| Root number: | $1$ |
| Artin number field: | Galois closure of 6.4.104875.1 |
| Galois orbit size: | $1$ |
| Smallest permutation container: | $C_3^2:D_4$ |
| Parity: | odd |
| Projective image: | $\SOPlus(4,2)$ |
| Projective field: | Galois closure of 6.4.104875.1 |
Galois action
Roots of defining polynomial
The roots of $f$ are computed in an extension of $\Q_{ 19 }$ to precision 5.
Minimal polynomial of a generator $a$ of $K$ over $\mathbb{Q}_{ 19 }$:
\( x^{2} + 18x + 2 \)
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Roots:
| $r_{ 1 }$ | $=$ |
\( 16 + 11\cdot 19 + 15\cdot 19^{2} + 13\cdot 19^{3} + 9\cdot 19^{4} +O(19^{5})\)
|
| $r_{ 2 }$ | $=$ |
\( 9 a + 4 + \left(7 a + 2\right)\cdot 19 + \left(17 a + 6\right)\cdot 19^{2} + \left(9 a + 3\right)\cdot 19^{3} + \left(11 a + 16\right)\cdot 19^{4} +O(19^{5})\)
|
| $r_{ 3 }$ | $=$ |
\( 10 a + 13 + 11 a\cdot 19 + \left(a + 16\right)\cdot 19^{2} + \left(9 a + 14\right)\cdot 19^{3} + \left(7 a + 17\right)\cdot 19^{4} +O(19^{5})\)
|
| $r_{ 4 }$ | $=$ |
\( 17 a + 3 + \left(16 a + 13\right)\cdot 19 + 18 a\cdot 19^{2} + \left(13 a + 5\right)\cdot 19^{3} + \left(16 a + 3\right)\cdot 19^{4} +O(19^{5})\)
|
| $r_{ 5 }$ | $=$ |
\( 3 + 16\cdot 19 + 15\cdot 19^{2} + 4\cdot 19^{4} +O(19^{5})\)
|
| $r_{ 6 }$ | $=$ |
\( 2 a + 1 + \left(2 a + 13\right)\cdot 19 + 2\cdot 19^{2} + 5 a\cdot 19^{3} + \left(2 a + 6\right)\cdot 19^{4} +O(19^{5})\)
|
Generators of the action on the roots $r_1, \ldots, r_{ 6 }$
| Cycle notation |
Character values on conjugacy classes
| Size | Order | Action on $r_1, \ldots, r_{ 6 }$ | Character values |
| $c1$ | |||
| $1$ | $1$ | $()$ | $4$ |
| $6$ | $2$ | $(1,2)(3,4)(5,6)$ | $0$ |
| $6$ | $2$ | $(3,5)$ | $2$ |
| $9$ | $2$ | $(3,5)(4,6)$ | $0$ |
| $4$ | $3$ | $(1,4,6)(2,3,5)$ | $-2$ |
| $4$ | $3$ | $(1,4,6)$ | $1$ |
| $18$ | $4$ | $(1,2)(3,6,5,4)$ | $0$ |
| $12$ | $6$ | $(1,3,4,5,6,2)$ | $0$ |
| $12$ | $6$ | $(1,4,6)(3,5)$ | $-1$ |