Properties

Label 2.2855.15t2.a.c
Dimension $2$
Group $D_{15}$
Conductor $2855$
Root number $1$
Indicator $1$

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Basic invariants

Dimension: $2$
Group: $D_{15}$
Conductor: \(2855\)\(\medspace = 5 \cdot 571 \)
Frobenius-Schur indicator: $1$
Root number: $1$
Artin stem field: Galois closure of 15.1.1546118540397002491484375.1
Galois orbit size: $4$
Smallest permutation container: $D_{15}$
Parity: odd
Determinant: 1.2855.2t1.a.a
Projective image: $D_{15}$
Projective stem field: Galois closure of 15.1.1546118540397002491484375.1

Defining polynomial

$f(x)$$=$ \( x^{15} - 2 x^{14} - 8 x^{13} + 15 x^{12} + 43 x^{11} - 5 x^{10} - 231 x^{9} + 107 x^{8} + 1601 x^{7} + \cdots + 8707 \) Copy content Toggle raw display .

The roots of $f$ are computed in an extension of $\Q_{ 29 }$ to precision 5.

Minimal polynomial of a generator $a$ of $K$ over $\mathbb{Q}_{ 29 }$: \( x^{5} + 3x + 27 \) Copy content Toggle raw display

Roots:
$r_{ 1 }$ $=$ \( 2 a^{4} + 3 a^{3} + 4 a^{2} + 17 a + 2 + \left(4 a^{4} + 18 a^{3} + 8 a^{2} + 11 a + 23\right)\cdot 29 + \left(20 a^{4} + 18 a^{3} + 14 a^{2} + 11 a + 7\right)\cdot 29^{2} + \left(6 a^{4} + 2 a^{3} + 21 a^{2} + 24\right)\cdot 29^{3} + \left(16 a^{4} + 21 a^{3} + 10 a^{2} + 8 a + 10\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display
$r_{ 2 }$ $=$ \( 4 a^{4} + 27 a^{3} + 16 a^{2} + 7 a + 23 + \left(24 a^{4} + a^{3} + 4 a + 3\right)\cdot 29 + \left(a^{4} + 25 a^{3} + 8 a^{2} + 7 a + 19\right)\cdot 29^{2} + \left(28 a^{4} + 17 a^{3} + 20 a^{2} + 14 a + 28\right)\cdot 29^{3} + \left(24 a^{4} + 23 a^{3} + 24 a^{2} + 7 a\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display
$r_{ 3 }$ $=$ \( 6 a^{4} + 14 a^{3} + 17 a^{2} + 25 a + 10 + \left(3 a^{4} + 23 a^{3} + 28 a^{2} + 27 a + 25\right)\cdot 29 + \left(4 a^{3} + 7 a^{2} + a + 2\right)\cdot 29^{2} + \left(11 a^{4} + 4 a^{3} + 9 a^{2} + 22 a + 22\right)\cdot 29^{3} + \left(18 a^{4} + 14 a^{3} + 22 a^{2} + 16 a + 26\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display
$r_{ 4 }$ $=$ \( 9 a^{4} + 2 a^{3} + 20 a^{2} + 6 a + 13 + \left(14 a^{4} + 24 a^{3} + 18 a^{2} + 15 a + 24\right)\cdot 29 + \left(a^{4} + 7 a^{3} + 27 a^{2} + 2 a + 26\right)\cdot 29^{2} + \left(22 a^{4} + 26 a^{3} + 3 a^{2} + 7 a + 8\right)\cdot 29^{3} + \left(a^{4} + 28 a^{3} + 21 a + 28\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display
$r_{ 5 }$ $=$ \( 9 a^{4} + 4 a^{3} + 17 a^{2} + 11 a + 23 + \left(6 a^{4} + 13 a^{3} + 26 a^{2} + 10 a + 3\right)\cdot 29 + \left(4 a^{4} + 9 a^{3} + 22 a^{2} + 21 a + 1\right)\cdot 29^{2} + \left(8 a^{4} + 12 a^{3} + 19 a^{2} + 21 a + 21\right)\cdot 29^{3} + \left(13 a^{4} + 9 a^{3} + 18 a^{2} + 11 a + 8\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display
$r_{ 6 }$ $=$ \( 9 a^{4} + 25 a^{3} + 22 a^{2} + 8 a + 23 + \left(16 a^{4} + 26 a^{3} + 26 a^{2} + 5 a + 27\right)\cdot 29 + \left(2 a^{4} + 14 a^{3} + 9 a^{2} + 9 a + 2\right)\cdot 29^{2} + \left(26 a^{4} + 6 a^{3} + 10 a^{2} + 7 a + 6\right)\cdot 29^{3} + \left(9 a^{3} + 22 a^{2} + 25 a + 2\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display
$r_{ 7 }$ $=$ \( 12 a^{4} + 2 a^{3} + 8 a^{2} + 9 a + 26 + \left(11 a^{4} + a^{3} + 10 a^{2} + 6 a + 5\right)\cdot 29 + \left(9 a^{3} + 5 a^{2} + 27 a + 24\right)\cdot 29^{2} + \left(a^{4} + 22 a^{3} + 25 a^{2} + 3 a + 4\right)\cdot 29^{3} + \left(12 a^{4} + 16 a^{3} + a^{2} + 26 a + 18\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display
$r_{ 8 }$ $=$ \( 15 a^{4} + 19 a^{3} + 23 a^{2} + 7 a + 10 + \left(8 a^{4} + 2 a^{3} + 8 a^{2} + 6 a + 16\right)\cdot 29 + \left(2 a^{4} + 21 a^{3} + 11 a^{2} + 21 a + 5\right)\cdot 29^{2} + \left(9 a^{4} + 12 a^{3} + 23 a^{2} + 15 a + 24\right)\cdot 29^{3} + \left(11 a^{4} + 26 a^{3} + 8 a^{2} + 4\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display
$r_{ 9 }$ $=$ \( 16 a^{4} + 22 a^{3} + 9 a^{2} + 25 a + 5 + \left(23 a^{4} + 20 a^{3} + 11 a^{2} + 9 a + 16\right)\cdot 29 + \left(10 a^{4} + 28 a^{3} + 5 a^{2} + 11 a + 28\right)\cdot 29^{2} + \left(5 a^{4} + a^{3} + 12 a^{2} + 12 a + 25\right)\cdot 29^{3} + \left(20 a^{4} + 28 a^{3} + 4 a^{2} + 2 a + 7\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display
$r_{ 10 }$ $=$ \( 17 a^{4} + 5 a^{3} + 19 a^{2} + 16 a + 2 + \left(26 a^{4} + 15 a^{3} + 18 a^{2} + 23 a + 27\right)\cdot 29 + \left(8 a^{4} + 12 a^{3} + 14 a^{2} + 21 a + 12\right)\cdot 29^{2} + \left(17 a^{4} + 3 a^{3} + 9 a^{2} + 14\right)\cdot 29^{3} + \left(23 a^{4} + 6 a^{3} + 13 a^{2} + 15 a + 3\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display
$r_{ 11 }$ $=$ \( 18 a^{4} + 3 a^{3} + 2 a^{2} + 24 a + 16 + \left(11 a^{4} + 6 a^{3} + 13 a + 8\right)\cdot 29 + \left(24 a^{4} + 21 a^{3} + 20 a^{2} + 17 a + 15\right)\cdot 29^{2} + \left(13 a^{4} + 6 a^{3} + 18 a^{2} + 8 a + 23\right)\cdot 29^{3} + \left(21 a^{4} + 24 a^{3} + 9 a^{2} + 25 a + 15\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display
$r_{ 12 }$ $=$ \( 18 a^{4} + 22 a^{3} + 22 a^{2} + 18 a + 4 + \left(8 a^{4} + 2 a^{3} + 22 a^{2} + 4 a + 15\right)\cdot 29 + \left(11 a^{4} + 11 a^{2} + 14 a + 6\right)\cdot 29^{2} + \left(7 a^{4} + 4 a^{3} + 6 a^{2} + 23 a + 19\right)\cdot 29^{3} + \left(5 a^{4} + 26 a^{3} + 19 a^{2} + a + 12\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display
$r_{ 13 }$ $=$ \( 20 a^{4} + a^{3} + 8 a^{2} + 8 a + 15 + \left(2 a^{4} + 19 a^{3} + 15 a^{2} + 8 a + 4\right)\cdot 29 + \left(20 a^{4} + 24 a^{3} + 20 a^{2} + 3 a + 28\right)\cdot 29^{2} + \left(5 a^{4} + 28 a^{3} + 25 a^{2} + 7 a + 3\right)\cdot 29^{3} + \left(21 a^{4} + 9 a^{3} + 11 a^{2} + 19 a + 15\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display
$r_{ 14 }$ $=$ \( 20 a^{4} + 3 a^{3} + 3 a^{2} + 19 a + 22 + \left(19 a^{4} + 12 a^{3} + 12 a^{2} + 18 a + 25\right)\cdot 29 + \left(4 a^{4} + a^{3} + 28 a^{2} + 24 a + 22\right)\cdot 29^{2} + \left(19 a^{4} + 23 a^{3} + 12 a^{2} + a + 7\right)\cdot 29^{3} + \left(16 a^{4} + 22 a^{3} + 7 a^{2} + 2 a\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display
$r_{ 15 }$ $=$ \( 28 a^{4} + 22 a^{3} + 13 a^{2} + 3 a + 11 + \left(21 a^{4} + 15 a^{3} + 23 a^{2} + 8 a + 4\right)\cdot 29 + \left(2 a^{4} + 3 a^{3} + 23 a^{2} + 8 a + 27\right)\cdot 29^{2} + \left(22 a^{4} + a^{3} + 12 a^{2} + 27 a + 25\right)\cdot 29^{3} + \left(24 a^{4} + 23 a^{3} + 27 a^{2} + 19 a + 17\right)\cdot 29^{4} +O(29^{5})\) Copy content Toggle raw display

Generators of the action on the roots $r_1, \ldots, r_{ 15 }$

Cycle notation
$(1,4)(2,12)(3,11)(5,13)(6,10)(8,14)(9,15)$
$(1,9,13,7,5,15,4,3,2,8,6,10,14,12,11)$
$(1,7,4,8,14)(2,10,11,13,15)(3,6,12,9,5)$

Character values on conjugacy classes

SizeOrderAction on $r_1, \ldots, r_{ 15 }$ Character value
$1$$1$$()$$2$
$15$$2$$(1,4)(2,12)(3,11)(5,13)(6,10)(8,14)(9,15)$$0$
$2$$3$$(1,15,6)(2,12,7)(3,14,13)(4,10,9)(5,8,11)$$-1$
$2$$5$$(1,7,4,8,14)(2,10,11,13,15)(3,6,12,9,5)$$-\zeta_{15}^{7} + \zeta_{15}^{3} - \zeta_{15}^{2}$
$2$$5$$(1,4,14,7,8)(2,11,15,10,13)(3,12,5,6,9)$$\zeta_{15}^{7} - \zeta_{15}^{3} + \zeta_{15}^{2} - 1$
$2$$15$$(1,9,13,7,5,15,4,3,2,8,6,10,14,12,11)$$-\zeta_{15}^{6} + \zeta_{15}^{4} - \zeta_{15}$
$2$$15$$(1,13,5,4,2,6,14,11,9,7,15,3,8,10,12)$$2 \zeta_{15}^{7} - \zeta_{15}^{5} + \zeta_{15}^{4} - \zeta_{15}^{3} + \zeta_{15} - 1$
$2$$15$$(1,5,2,14,9,15,8,12,13,4,6,11,7,3,10)$$-\zeta_{15}^{7} + \zeta_{15}^{6} - \zeta_{15}^{4} + \zeta_{15}^{3} - \zeta_{15}^{2} + \zeta_{15} + 1$
$2$$15$$(1,3,11,4,12,15,14,5,10,7,6,13,8,9,2)$$-\zeta_{15}^{7} + \zeta_{15}^{5} - \zeta_{15}^{4} + \zeta_{15}^{2} - \zeta_{15} + 1$

The blue line marks the conjugacy class containing complex conjugation.