Properties

Label 2.2e2_41.4t3.1
Dimension 2
Group $D_{4}$
Conductor $ 2^{2} \cdot 41 $
Frobenius-Schur indicator 1

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Basic invariants

Dimension:$2$
Group:$D_{4}$
Conductor:$164= 2^{2} \cdot 41 $
Artin number field: Splitting field of $f= x^{4} - 5 x^{2} - 4 $ 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 $\Q_{ 61 }$ to precision 5.
Roots:
$r_{ 1 }$ $=$ $ 21 + 59\cdot 61 + 37\cdot 61^{2} + 5\cdot 61^{3} + 49\cdot 61^{4} +O\left(61^{ 5 }\right)$
$r_{ 2 }$ $=$ $ 28 + 36\cdot 61 + 9\cdot 61^{3} + 35\cdot 61^{4} +O\left(61^{ 5 }\right)$
$r_{ 3 }$ $=$ $ 33 + 24\cdot 61 + 60\cdot 61^{2} + 51\cdot 61^{3} + 25\cdot 61^{4} +O\left(61^{ 5 }\right)$
$r_{ 4 }$ $=$ $ 40 + 61 + 23\cdot 61^{2} + 55\cdot 61^{3} + 11\cdot 61^{4} +O\left(61^{ 5 }\right)$

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

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

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.