LMFDB - Artin representation 2.1280.8t6.b.b

Basic invariants

Dimension:	$2$
Group:	$D_{8}$
Conductor:	$1280$$\medspace = 2^{8} \cdot 5 $
Frobenius-Schur indicator:	$1$
Root number:	$1$
Artin stem field:	Galois closure of 8.2.2621440000.2
Galois orbit size:	$2$
Smallest permutation container:	$D_{8}$
Parity:	odd
Determinant:	1.20.2t1.a.a
Projective image:	$D_4$
Projective stem field:	Galois closure of 4.0.1280.1

Defining polynomial

$f(x)$

$=$

$ x^{8} + 2x^{4} - 4 $

x^8 + 2*x^4 - 4

The roots of $f$ are computed in $\Q_{ 61 }$ to precision 7.

Roots:

$r_{ 1 }$	$=$	$ 9 + 30\cdot 61 + 59\cdot 61^{2} + 15\cdot 61^{3} + 57\cdot 61^{4} + 19\cdot 61^{5} + 57\cdot 61^{6} +O(61^{7})$ 9 + 3061 + 5961^2 + 1561^3 + 5761^4 + 1961^5 + 5761^6+O(61^7)
$r_{ 2 }$	$=$	$ 19 + 30\cdot 61 + 33\cdot 61^{2} + 20\cdot 61^{4} + 13\cdot 61^{5} + 55\cdot 61^{6} +O(61^{7})$ 19 + 3061 + 3361^2 + 2061^4 + 1361^5 + 55*61^6+O(61^7)
$r_{ 3 }$	$=$	$ 23 + 57\cdot 61 + 54\cdot 61^{2} + 10\cdot 61^{3} + 8\cdot 61^{4} + 53\cdot 61^{5} + 53\cdot 61^{6} +O(61^{7})$ 23 + 5761 + 5461^2 + 1061^3 + 861^4 + 5361^5 + 5361^6+O(61^7)
$r_{ 4 }$	$=$	$ 26 + 54\cdot 61 + 8\cdot 61^{2} + 55\cdot 61^{3} + 2\cdot 61^{4} + 40\cdot 61^{5} + 54\cdot 61^{6} +O(61^{7})$ 26 + 5461 + 861^2 + 5561^3 + 261^4 + 4061^5 + 5461^6+O(61^7)
$r_{ 5 }$	$=$	$ 35 + 6\cdot 61 + 52\cdot 61^{2} + 5\cdot 61^{3} + 58\cdot 61^{4} + 20\cdot 61^{5} + 6\cdot 61^{6} +O(61^{7})$ 35 + 661 + 5261^2 + 561^3 + 5861^4 + 2061^5 + 661^6+O(61^7)
$r_{ 6 }$	$=$	$ 38 + 3\cdot 61 + 6\cdot 61^{2} + 50\cdot 61^{3} + 52\cdot 61^{4} + 7\cdot 61^{5} + 7\cdot 61^{6} +O(61^{7})$ 38 + 361 + 661^2 + 5061^3 + 5261^4 + 761^5 + 761^6+O(61^7)
$r_{ 7 }$	$=$	$ 42 + 30\cdot 61 + 27\cdot 61^{2} + 60\cdot 61^{3} + 40\cdot 61^{4} + 47\cdot 61^{5} + 5\cdot 61^{6} +O(61^{7})$ 42 + 3061 + 2761^2 + 6061^3 + 4061^4 + 4761^5 + 561^6+O(61^7)
$r_{ 8 }$	$=$	$ 52 + 30\cdot 61 + 61^{2} + 45\cdot 61^{3} + 3\cdot 61^{4} + 41\cdot 61^{5} + 3\cdot 61^{6} +O(61^{7})$ 52 + 3061 + 61^2 + 4561^3 + 361^4 + 4161^5 + 3*61^6+O(61^7)

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

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

Character values on conjugacy classes

Size	Order	Action on $r_1, \ldots, r_{ 8 }$	Character value	Complex conjugation
$1$	$1$	$()$	$2$
$1$	$2$	$(1,8)(2,7)(3,6)(4,5)$	$-2$
$4$	$2$	$(1,8)(2,4)(5,7)$	$0$	✓
$4$	$2$	$(1,2)(3,5)(4,6)(7,8)$	$0$
$2$	$4$	$(1,3,8,6)(2,4,7,5)$	$0$
$2$	$8$	$(1,7,3,5,8,2,6,4)$	$\zeta_{8}^{3} - \zeta_{8}$
$2$	$8$	$(1,5,6,7,8,4,3,2)$	$-\zeta_{8}^{3} + \zeta_{8}$

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Basic invariants

Defining polynomial

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

Character values on conjugacy classes

This project is supported by grants from the US National Science Foundation, the UK Engineering and Physical Sciences Research Council, and the Simons Foundation.

Label	2.1280.8t6.b.b
Dimension	$2$
Group	$D_{8}$
Conductor	$1280$
Root number	$1$
Indicator	$1$

$r_{ 1 }$	$=$	\( 9 + 30\cdot 61 + 59\cdot 61^{2} + 15\cdot 61^{3} + 57\cdot 61^{4} + 19\cdot 61^{5} + 57\cdot 61^{6} +O(61^{7})\) 9 + 3061 + 5961^2 + 1561^3 + 5761^4 + 1961^5 + 5761^6+O(61^7)
$r_{ 2 }$	$=$	\( 19 + 30\cdot 61 + 33\cdot 61^{2} + 20\cdot 61^{4} + 13\cdot 61^{5} + 55\cdot 61^{6} +O(61^{7})\) 19 + 3061 + 3361^2 + 2061^4 + 1361^5 + 55*61^6+O(61^7)
$r_{ 3 }$	$=$	\( 23 + 57\cdot 61 + 54\cdot 61^{2} + 10\cdot 61^{3} + 8\cdot 61^{4} + 53\cdot 61^{5} + 53\cdot 61^{6} +O(61^{7})\) 23 + 5761 + 5461^2 + 1061^3 + 861^4 + 5361^5 + 5361^6+O(61^7)
$r_{ 4 }$	$=$	\( 26 + 54\cdot 61 + 8\cdot 61^{2} + 55\cdot 61^{3} + 2\cdot 61^{4} + 40\cdot 61^{5} + 54\cdot 61^{6} +O(61^{7})\) 26 + 5461 + 861^2 + 5561^3 + 261^4 + 4061^5 + 5461^6+O(61^7)
$r_{ 5 }$	$=$	\( 35 + 6\cdot 61 + 52\cdot 61^{2} + 5\cdot 61^{3} + 58\cdot 61^{4} + 20\cdot 61^{5} + 6\cdot 61^{6} +O(61^{7})\) 35 + 661 + 5261^2 + 561^3 + 5861^4 + 2061^5 + 661^6+O(61^7)
$r_{ 6 }$	$=$	\( 38 + 3\cdot 61 + 6\cdot 61^{2} + 50\cdot 61^{3} + 52\cdot 61^{4} + 7\cdot 61^{5} + 7\cdot 61^{6} +O(61^{7})\) 38 + 361 + 661^2 + 5061^3 + 5261^4 + 761^5 + 761^6+O(61^7)
$r_{ 7 }$	$=$	\( 42 + 30\cdot 61 + 27\cdot 61^{2} + 60\cdot 61^{3} + 40\cdot 61^{4} + 47\cdot 61^{5} + 5\cdot 61^{6} +O(61^{7})\) 42 + 3061 + 2761^2 + 6061^3 + 4061^4 + 4761^5 + 561^6+O(61^7)
$r_{ 8 }$	$=$	\( 52 + 30\cdot 61 + 61^{2} + 45\cdot 61^{3} + 3\cdot 61^{4} + 41\cdot 61^{5} + 3\cdot 61^{6} +O(61^{7})\) 52 + 3061 + 61^2 + 4561^3 + 361^4 + 4161^5 + 3*61^6+O(61^7)