Properties

Label 2.5_2521.4t3.3
Dimension 2
Group $D_4$
Conductor $ 5 \cdot 2521 $
Frobenius-Schur indicator 1

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Basic invariants

Dimension:$2$
Group:$D_4$
Conductor:$12605= 5 \cdot 2521 $
Artin number field: Splitting field of $f= x^{8} - 4 x^{7} + 104 x^{6} - 298 x^{5} + 2891 x^{4} - 5290 x^{3} - 454 x^{2} + 3050 x + 6355 $ over $\Q$
Size of Galois orbit: 1
Smallest containing permutation representation: $D_{4}$
Parity: Even

Galois action

Roots of defining polynomial

The roots of $f$ are computed in $\Q_{ 31 }$ to precision 7.
Roots:
$r_{ 1 }$ $=$ $ 31 + 11\cdot 31^{2} + 24\cdot 31^{3} + 25\cdot 31^{4} + 18\cdot 31^{5} + 26\cdot 31^{6} +O\left(31^{ 7 }\right)$
$r_{ 2 }$ $=$ $ 1 + 30\cdot 31 + 19\cdot 31^{2} + 6\cdot 31^{3} + 5\cdot 31^{4} + 12\cdot 31^{5} + 4\cdot 31^{6} +O\left(31^{ 7 }\right)$
$r_{ 3 }$ $=$ $ 2 + 11\cdot 31 + 8\cdot 31^{3} + 17\cdot 31^{4} + 16\cdot 31^{5} + 30\cdot 31^{6} +O\left(31^{ 7 }\right)$
$r_{ 4 }$ $=$ $ 6 + 19\cdot 31 + 17\cdot 31^{2} + 23\cdot 31^{3} + 27\cdot 31^{4} + 6\cdot 31^{6} +O\left(31^{ 7 }\right)$
$r_{ 5 }$ $=$ $ 8 + 29\cdot 31 + 6\cdot 31^{2} + 7\cdot 31^{3} + 19\cdot 31^{4} + 29\cdot 31^{5} + 9\cdot 31^{6} +O\left(31^{ 7 }\right)$
$r_{ 6 }$ $=$ $ 24 + 31 + 24\cdot 31^{2} + 23\cdot 31^{3} + 11\cdot 31^{4} + 31^{5} + 21\cdot 31^{6} +O\left(31^{ 7 }\right)$
$r_{ 7 }$ $=$ $ 26 + 11\cdot 31 + 13\cdot 31^{2} + 7\cdot 31^{3} + 3\cdot 31^{4} + 30\cdot 31^{5} + 24\cdot 31^{6} +O\left(31^{ 7 }\right)$
$r_{ 8 }$ $=$ $ 30 + 19\cdot 31 + 30\cdot 31^{2} + 22\cdot 31^{3} + 13\cdot 31^{4} + 14\cdot 31^{5} +O\left(31^{ 7 }\right)$

Generators of the action on the roots $r_1, \ldots, r_{ 8 }$

Cycle notation
$(1,2)(3,5)(4,7)(6,8)$
$(1,3)(2,8)(4,5)(6,7)$

Character values on conjugacy classes

SizeOrderAction on $r_1, \ldots, r_{ 8 }$ Character values
$c1$
$1$ $1$ $()$ $2$
$1$ $2$ $(1,7)(2,4)(3,6)(5,8)$ $-2$
$2$ $2$ $(1,2)(3,5)(4,7)(6,8)$ $0$
$2$ $2$ $(1,3)(2,8)(4,5)(6,7)$ $0$
$2$ $4$ $(1,8,7,5)(2,3,4,6)$ $0$
The blue line marks the conjugacy class containing complex conjugation.