Properties

Label 2.2e8_31e2.24t7.4c1
Dimension 2
Group $\SL(2,3)$
Conductor $ 2^{8} \cdot 31^{2}$
Root number 1
Frobenius-Schur indicator -1

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Basic invariants

Dimension:$2$
Group:$\SL(2,3)$
Conductor:$246016= 2^{8} \cdot 31^{2} $
Artin number field: Splitting field of $f= x^{8} + 12 x^{6} + 42 x^{4} + 40 x^{2} + 4 $ over $\Q$
Size of Galois orbit: 1
Smallest containing permutation representation: 24T7
Parity: Even
Determinant: 1.1.1t1.1c1

Galois action

Roots of defining polynomial

The roots of $f$ are computed in an extension of $\Q_{ 11 }$ to precision 16.
Minimal polynomial of a generator $a$ of $K$ over $\mathbb{Q}_{ 11 }$: $ x^{3} + 2 x + 9 $
Roots:
$r_{ 1 }$ $=$ $ 1 + 10\cdot 11 + 9\cdot 11^{2} + 4\cdot 11^{3} + 3\cdot 11^{5} + 6\cdot 11^{6} + 8\cdot 11^{7} + 2\cdot 11^{8} + 4\cdot 11^{9} + 10\cdot 11^{10} + 7\cdot 11^{11} + 5\cdot 11^{12} + 9\cdot 11^{13} + 4\cdot 11^{14} + 5\cdot 11^{15} +O\left(11^{ 16 }\right)$
$r_{ 2 }$ $=$ $ 6 a^{2} + 7 a + 6 + \left(a + 10\right)\cdot 11 + \left(3 a^{2} + 10 a + 5\right)\cdot 11^{2} + \left(8 a^{2} + 2 a + 3\right)\cdot 11^{3} + \left(2 a^{2} + 2 a + 1\right)\cdot 11^{4} + \left(3 a^{2} + 7 a + 3\right)\cdot 11^{5} + \left(5 a + 3\right)\cdot 11^{6} + \left(9 a^{2} + 10 a + 3\right)\cdot 11^{7} + \left(4 a^{2} + 9 a + 9\right)\cdot 11^{8} + \left(a^{2} + 3 a + 8\right)\cdot 11^{9} + \left(8 a^{2} + 5\right)\cdot 11^{10} + \left(6 a^{2} + 8 a + 1\right)\cdot 11^{11} + \left(6 a^{2} + 7 a + 2\right)\cdot 11^{12} + \left(3 a^{2} + 9 a + 8\right)\cdot 11^{13} + \left(a^{2} + 3 a + 9\right)\cdot 11^{14} + \left(10 a^{2} + 9 a + 4\right)\cdot 11^{15} +O\left(11^{ 16 }\right)$
$r_{ 3 }$ $=$ $ 10 a^{2} + 4 a + 4 + \left(5 a^{2} + 10 a + 10\right)\cdot 11 + \left(10 a^{2} + 4\right)\cdot 11^{2} + \left(8 a^{2} + a + 4\right)\cdot 11^{3} + \left(2 a^{2} + 4 a + 1\right)\cdot 11^{4} + \left(4 a^{2} + 4 a + 8\right)\cdot 11^{5} + \left(a^{2} + 10 a + 4\right)\cdot 11^{6} + \left(8 a^{2} + 9 a + 9\right)\cdot 11^{7} + \left(2 a^{2} + 2 a + 2\right)\cdot 11^{8} + \left(8 a^{2} + 7 a + 3\right)\cdot 11^{9} + \left(6 a^{2} + 2 a\right)\cdot 11^{10} + \left(7 a^{2} + 10 a + 10\right)\cdot 11^{11} + \left(3 a^{2} + 4 a + 1\right)\cdot 11^{12} + \left(4 a^{2} + 2 a + 9\right)\cdot 11^{13} + \left(4 a^{2} + 9 a + 2\right)\cdot 11^{14} + \left(6 a^{2} + 3 a + 7\right)\cdot 11^{15} +O\left(11^{ 16 }\right)$
$r_{ 4 }$ $=$ $ 6 a^{2} + 6 + \left(4 a^{2} + 10 a + 8\right)\cdot 11 + \left(8 a^{2} + 10 a + 5\right)\cdot 11^{2} + \left(4 a^{2} + 6 a + 2\right)\cdot 11^{3} + \left(5 a^{2} + 4 a + 1\right)\cdot 11^{4} + \left(3 a^{2} + 10 a + 7\right)\cdot 11^{5} + \left(9 a^{2} + 5 a\right)\cdot 11^{6} + \left(4 a^{2} + a + 5\right)\cdot 11^{7} + \left(3 a^{2} + 9 a + 7\right)\cdot 11^{8} + \left(a^{2} + 10 a + 8\right)\cdot 11^{9} + \left(7 a^{2} + 7 a\right)\cdot 11^{10} + \left(7 a^{2} + 3 a + 10\right)\cdot 11^{11} + \left(9 a + 8\right)\cdot 11^{12} + \left(3 a^{2} + 9 a + 3\right)\cdot 11^{13} + \left(5 a^{2} + 8 a\right)\cdot 11^{14} + \left(5 a^{2} + 8 a + 6\right)\cdot 11^{15} +O\left(11^{ 16 }\right)$
$r_{ 5 }$ $=$ $ 10 + 11^{2} + 6\cdot 11^{3} + 10\cdot 11^{4} + 7\cdot 11^{5} + 4\cdot 11^{6} + 2\cdot 11^{7} + 8\cdot 11^{8} + 6\cdot 11^{9} + 3\cdot 11^{11} + 5\cdot 11^{12} + 11^{13} + 6\cdot 11^{14} + 5\cdot 11^{15} +O\left(11^{ 16 }\right)$
$r_{ 6 }$ $=$ $ 5 a^{2} + 4 a + 5 + \left(10 a^{2} + 9 a\right)\cdot 11 + \left(7 a^{2} + 5\right)\cdot 11^{2} + \left(2 a^{2} + 8 a + 7\right)\cdot 11^{3} + \left(8 a^{2} + 8 a + 9\right)\cdot 11^{4} + \left(7 a^{2} + 3 a + 7\right)\cdot 11^{5} + \left(10 a^{2} + 5 a + 7\right)\cdot 11^{6} + \left(a^{2} + 7\right)\cdot 11^{7} + \left(6 a^{2} + a + 1\right)\cdot 11^{8} + \left(9 a^{2} + 7 a + 2\right)\cdot 11^{9} + \left(2 a^{2} + 10 a + 5\right)\cdot 11^{10} + \left(4 a^{2} + 2 a + 9\right)\cdot 11^{11} + \left(4 a^{2} + 3 a + 8\right)\cdot 11^{12} + \left(7 a^{2} + a + 2\right)\cdot 11^{13} + \left(9 a^{2} + 7 a + 1\right)\cdot 11^{14} + \left(a + 6\right)\cdot 11^{15} +O\left(11^{ 16 }\right)$
$r_{ 7 }$ $=$ $ a^{2} + 7 a + 7 + 5 a^{2}11 + \left(10 a + 6\right)\cdot 11^{2} + \left(2 a^{2} + 9 a + 6\right)\cdot 11^{3} + \left(8 a^{2} + 6 a + 9\right)\cdot 11^{4} + \left(6 a^{2} + 6 a + 2\right)\cdot 11^{5} + \left(9 a^{2} + 6\right)\cdot 11^{6} + \left(2 a^{2} + a + 1\right)\cdot 11^{7} + \left(8 a^{2} + 8 a + 8\right)\cdot 11^{8} + \left(2 a^{2} + 3 a + 7\right)\cdot 11^{9} + \left(4 a^{2} + 8 a + 10\right)\cdot 11^{10} + 3 a^{2}11^{11} + \left(7 a^{2} + 6 a + 9\right)\cdot 11^{12} + \left(6 a^{2} + 8 a + 1\right)\cdot 11^{13} + \left(6 a^{2} + a + 8\right)\cdot 11^{14} + \left(4 a^{2} + 7 a + 3\right)\cdot 11^{15} +O\left(11^{ 16 }\right)$
$r_{ 8 }$ $=$ $ 5 a^{2} + 5 + \left(6 a^{2} + a + 2\right)\cdot 11 + \left(2 a^{2} + 5\right)\cdot 11^{2} + \left(6 a^{2} + 4 a + 8\right)\cdot 11^{3} + \left(5 a^{2} + 6 a + 9\right)\cdot 11^{4} + \left(7 a^{2} + 3\right)\cdot 11^{5} + \left(a^{2} + 5 a + 10\right)\cdot 11^{6} + \left(6 a^{2} + 9 a + 5\right)\cdot 11^{7} + \left(7 a^{2} + a + 3\right)\cdot 11^{8} + \left(9 a^{2} + 2\right)\cdot 11^{9} + \left(3 a^{2} + 3 a + 10\right)\cdot 11^{10} + \left(3 a^{2} + 7 a\right)\cdot 11^{11} + \left(10 a^{2} + a + 2\right)\cdot 11^{12} + \left(7 a^{2} + a + 7\right)\cdot 11^{13} + \left(5 a^{2} + 2 a + 10\right)\cdot 11^{14} + \left(5 a^{2} + 2 a + 4\right)\cdot 11^{15} +O\left(11^{ 16 }\right)$

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

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

Character values on conjugacy classes

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