Basic invariants
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} + 18 x + 2 $
Roots:
| $r_{ 1 }$ |
$=$ |
$ 2 + 6\cdot 19 + 7\cdot 19^{2} + 15\cdot 19^{3} + 10\cdot 19^{4} +O\left(19^{ 5 }\right)$ |
| $r_{ 2 }$ |
$=$ |
$ 9 a + 5 + \left(7 a + 17\right)\cdot 19 + \left(13 a + 10\right)\cdot 19^{2} + \left(18 a + 1\right)\cdot 19^{3} + \left(9 a + 13\right)\cdot 19^{4} +O\left(19^{ 5 }\right)$ |
| $r_{ 3 }$ |
$=$ |
$ 17 a + 1 + \left(2 a + 4\right)\cdot 19 + \left(15 a + 4\right)\cdot 19^{2} + \left(6 a + 5\right)\cdot 19^{3} + \left(10 a + 13\right)\cdot 19^{4} +O\left(19^{ 5 }\right)$ |
| $r_{ 4 }$ |
$=$ |
$ 18 a + \left(15 a + 13\right)\cdot 19 + \left(16 a + 9\right)\cdot 19^{2} + \left(3 a + 12\right)\cdot 19^{3} + \left(5 a + 17\right)\cdot 19^{4} +O\left(19^{ 5 }\right)$ |
| $r_{ 5 }$ |
$=$ |
$ a + 18 + \left(3 a + 10\right)\cdot 19 + \left(2 a + 10\right)\cdot 19^{2} + \left(15 a + 18\right)\cdot 19^{3} + \left(13 a + 18\right)\cdot 19^{4} +O\left(19^{ 5 }\right)$ |
| $r_{ 6 }$ |
$=$ |
$ 10 a + 14 + \left(11 a + 15\right)\cdot 19 + \left(5 a + 16\right)\cdot 19^{2} + 6\cdot 19^{3} + \left(9 a + 4\right)\cdot 19^{4} +O\left(19^{ 5 }\right)$ |
| $r_{ 7 }$ |
$=$ |
$ 2 a + 18 + \left(16 a + 8\right)\cdot 19 + \left(3 a + 16\right)\cdot 19^{2} + \left(12 a + 15\right)\cdot 19^{3} + \left(8 a + 16\right)\cdot 19^{4} +O\left(19^{ 5 }\right)$ |
Generators of the action on the roots
$r_1, \ldots, r_{ 7 }$
| Cycle notation |
| $(1,7)(2,4)(3,5)$ |
| $(1,4)(2,5)(6,7)$ |
Character values on conjugacy classes
| Size | Order | Action on
$r_1, \ldots, r_{ 7 }$
| Character value |
| $1$ | $1$ | $()$ | $2$ |
| $7$ | $2$ | $(1,7)(2,4)(3,5)$ | $0$ |
| $2$ | $7$ | $(1,6,7,4,5,3,2)$ | $-\zeta_{7}^{5} - \zeta_{7}^{4} - \zeta_{7}^{3} - \zeta_{7}^{2} - 1$ |
| $2$ | $7$ | $(1,7,5,2,6,4,3)$ | $\zeta_{7}^{5} + \zeta_{7}^{2}$ |
| $2$ | $7$ | $(1,4,2,7,3,6,5)$ | $\zeta_{7}^{4} + \zeta_{7}^{3}$ |
The blue line marks the conjugacy class containing complex conjugation.
