Properties

Label 2.2e3_3_5.8t11.1c1
Dimension 2
Group $Q_8:C_2$
Conductor $ 2^{3} \cdot 3 \cdot 5 $
Root number not computed
Frobenius-Schur indicator 0

Related objects

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Basic invariants

Dimension:$2$
Group:$Q_8:C_2$
Conductor:$120= 2^{3} \cdot 3 \cdot 5 $
Artin number field: Splitting field of $f= x^{8} - 2 x^{7} + x^{6} + 7 x^{4} - 16 x^{3} + 15 x^{2} - 6 x + 1 $ over $\Q$
Size of Galois orbit: 2
Smallest containing permutation representation: $Q_8:C_2$
Parity: Odd
Determinant: 1.2e3_3_5.2t1.2c1

Galois action

Roots of defining polynomial

The roots of $f$ are computed in $\Q_{ 79 }$ to precision 5.
Roots:
$r_{ 1 }$ $=$ $ 5 + 30\cdot 79 + 72\cdot 79^{2} + 33\cdot 79^{3} + 79^{4} +O\left(79^{ 5 }\right)$
$r_{ 2 }$ $=$ $ 12 + 33\cdot 79 + 31\cdot 79^{2} + 8\cdot 79^{3} + 71\cdot 79^{4} +O\left(79^{ 5 }\right)$
$r_{ 3 }$ $=$ $ 13 + 61\cdot 79 + 38\cdot 79^{2} + 10\cdot 79^{3} + 71\cdot 79^{4} +O\left(79^{ 5 }\right)$
$r_{ 4 }$ $=$ $ 48 + 63\cdot 79 + 40\cdot 79^{2} + 69\cdot 79^{3} + 7\cdot 79^{4} +O\left(79^{ 5 }\right)$
$r_{ 5 }$ $=$ $ 49 + 17\cdot 79 + 67\cdot 79^{2} + 5\cdot 79^{3} + 72\cdot 79^{4} +O\left(79^{ 5 }\right)$
$r_{ 6 }$ $=$ $ 60 + 5\cdot 79 + 43\cdot 79^{2} + 66\cdot 79^{3} + 43\cdot 79^{4} +O\left(79^{ 5 }\right)$
$r_{ 7 }$ $=$ $ 65 + 76\cdot 79^{2} + 38\cdot 79^{3} + 48\cdot 79^{4} +O\left(79^{ 5 }\right)$
$r_{ 8 }$ $=$ $ 66 + 24\cdot 79 + 25\cdot 79^{2} + 3\cdot 79^{3} +O\left(79^{ 5 }\right)$

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

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

Character values on conjugacy classes

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