Properties

Label 2.2e4_5e2_19e2.4t3.1
Dimension 2
Group $D_{4}$
Conductor $ 2^{4} \cdot 5^{2} \cdot 19^{2}$
Frobenius-Schur indicator 1

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Basic invariants

Dimension:$2$
Group:$D_{4}$
Conductor:$144400= 2^{4} \cdot 5^{2} \cdot 19^{2} $
Artin number field: Splitting field of $f= x^{4} - 1805 $ over $\Q$
Size of Galois orbit: 1
Smallest containing permutation representation: $D_{4}$
Parity: Odd

Galois action

Roots of defining polynomial

The roots of $f$ are computed in $\Q_{ 29 }$ to precision 7.
Roots:
$r_{ 1 }$ $=$ $ 8 + 23\cdot 29 + 10\cdot 29^{2} + 4\cdot 29^{3} + 13\cdot 29^{4} + 8\cdot 29^{6} +O\left(29^{ 7 }\right)$
$r_{ 2 }$ $=$ $ 9 + 26\cdot 29 + 16\cdot 29^{2} + 2\cdot 29^{3} + 24\cdot 29^{4} + 19\cdot 29^{5} + 17\cdot 29^{6} +O\left(29^{ 7 }\right)$
$r_{ 3 }$ $=$ $ 20 + 2\cdot 29 + 12\cdot 29^{2} + 26\cdot 29^{3} + 4\cdot 29^{4} + 9\cdot 29^{5} + 11\cdot 29^{6} +O\left(29^{ 7 }\right)$
$r_{ 4 }$ $=$ $ 21 + 5\cdot 29 + 18\cdot 29^{2} + 24\cdot 29^{3} + 15\cdot 29^{4} + 28\cdot 29^{5} + 20\cdot 29^{6} +O\left(29^{ 7 }\right)$

Generators of the action on the roots $r_1, \ldots, r_{ 4 }$

Cycle notation
$(1,2)(3,4)$
$(2,3)$

Character values on conjugacy classes

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