Basic invariants
| Dimension: | $1$ |
| Group: | $C_8$ |
| Conductor: | \(160\)\(\medspace = 2^{5} \cdot 5 \) |
| Artin field: | Galois closure of 8.8.1342177280000.1 |
| Galois orbit size: | $4$ |
| Smallest permutation container: | $C_8$ |
| Parity: | even |
| Dirichlet character: | \(\chi_{160}(29,\cdot)\) |
| Projective image: | $C_1$ |
| Projective field: | Galois closure of \(\Q\) |
Defining polynomial
| $f(x)$ | $=$ |
\( x^{8} - 40x^{6} + 500x^{4} - 2000x^{2} + 1250 \)
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The roots of $f$ are computed in $\Q_{ 31 }$ to precision 7.
Roots:
| $r_{ 1 }$ | $=$ |
\( 2 + 20\cdot 31 + 9\cdot 31^{2} + 25\cdot 31^{3} + 3\cdot 31^{4} + 20\cdot 31^{5} + 12\cdot 31^{6} +O(31^{7})\)
|
| $r_{ 2 }$ | $=$ |
\( 4 + 21\cdot 31 + 25\cdot 31^{2} + 20\cdot 31^{3} + 26\cdot 31^{4} + 14\cdot 31^{5} + 15\cdot 31^{6} +O(31^{7})\)
|
| $r_{ 3 }$ | $=$ |
\( 7 + 2\cdot 31 + 25\cdot 31^{2} + 17\cdot 31^{3} + 14\cdot 31^{4} + 23\cdot 31^{5} + 8\cdot 31^{6} +O(31^{7})\)
|
| $r_{ 4 }$ | $=$ |
\( 8 + 3\cdot 31^{2} + 11\cdot 31^{3} + 30\cdot 31^{4} + 19\cdot 31^{5} + 6\cdot 31^{6} +O(31^{7})\)
|
| $r_{ 5 }$ | $=$ |
\( 23 + 30\cdot 31 + 27\cdot 31^{2} + 19\cdot 31^{3} + 11\cdot 31^{5} + 24\cdot 31^{6} +O(31^{7})\)
|
| $r_{ 6 }$ | $=$ |
\( 24 + 28\cdot 31 + 5\cdot 31^{2} + 13\cdot 31^{3} + 16\cdot 31^{4} + 7\cdot 31^{5} + 22\cdot 31^{6} +O(31^{7})\)
|
| $r_{ 7 }$ | $=$ |
\( 27 + 9\cdot 31 + 5\cdot 31^{2} + 10\cdot 31^{3} + 4\cdot 31^{4} + 16\cdot 31^{5} + 15\cdot 31^{6} +O(31^{7})\)
|
| $r_{ 8 }$ | $=$ |
\( 29 + 10\cdot 31 + 21\cdot 31^{2} + 5\cdot 31^{3} + 27\cdot 31^{4} + 10\cdot 31^{5} + 18\cdot 31^{6} +O(31^{7})\)
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Generators of the action on the roots $r_1, \ldots, r_{ 8 }$
| Cycle notation |
Character values on conjugacy classes
| Size | Order | Action on $r_1, \ldots, r_{ 8 }$ | Character value |
| $1$ | $1$ | $()$ | $1$ |
| $1$ | $2$ | $(1,8)(2,7)(3,6)(4,5)$ | $-1$ |
| $1$ | $4$ | $(1,7,8,2)(3,4,6,5)$ | $-\zeta_{8}^{2}$ |
| $1$ | $4$ | $(1,2,8,7)(3,5,6,4)$ | $\zeta_{8}^{2}$ |
| $1$ | $8$ | $(1,3,7,4,8,6,2,5)$ | $\zeta_{8}^{3}$ |
| $1$ | $8$ | $(1,4,2,3,8,5,7,6)$ | $\zeta_{8}$ |
| $1$ | $8$ | $(1,6,7,5,8,3,2,4)$ | $-\zeta_{8}^{3}$ |
| $1$ | $8$ | $(1,5,2,6,8,4,7,3)$ | $-\zeta_{8}$ |
The blue line marks the conjugacy class containing complex conjugation.