Properties

Label 2.47.5t2.a.b
Dimension $2$
Group $D_{5}$
Conductor $47$
Root number $1$
Indicator $1$

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Basic invariants

Dimension: $2$
Group: $D_{5}$
Conductor: \(47\)
Frobenius-Schur indicator: $1$
Root number: $1$
Artin stem field: 5.1.2209.1
Galois orbit size: $2$
Smallest permutation container: $D_{5}$
Parity: odd
Determinant: 1.47.2t1.a.a
Projective image: $D_5$
Projective stem field: 5.1.2209.1

Defining polynomial

$f(x)$$=$\(x^{5} - 2 x^{4} + 2 x^{3} - x^{2} + 1\)  Toggle raw display.

The roots of $f$ are computed in an extension of $\Q_{ 11 }$ to precision 5.

Minimal polynomial of a generator $a$ of $K$ over $\mathbb{Q}_{ 11 }$: \(x^{2} + 7 x + 2\)  Toggle raw display

Roots:
$r_{ 1 }$ $=$ \( 4 a + 5 + \left(a + 7\right)\cdot 11 + \left(4 a + 1\right)\cdot 11^{2} + \left(9 a + 10\right)\cdot 11^{3} + \left(10 a + 5\right)\cdot 11^{4} +O(11^{5})\)  Toggle raw display
$r_{ 2 }$ $=$ \( 9 a + 6 + 3\cdot 11 + \left(2 a + 6\right)\cdot 11^{2} + \left(2 a + 5\right)\cdot 11^{3} + \left(9 a + 3\right)\cdot 11^{4} +O(11^{5})\)  Toggle raw display
$r_{ 3 }$ $=$ \( 7 a + 10 + \left(9 a + 8\right)\cdot 11 + \left(6 a + 5\right)\cdot 11^{2} + \left(a + 10\right)\cdot 11^{3} + 6\cdot 11^{4} +O(11^{5})\)  Toggle raw display
$r_{ 4 }$ $=$ \( 5 + 4\cdot 11 + 5\cdot 11^{2} + 5\cdot 11^{3} +O(11^{5})\)  Toggle raw display
$r_{ 5 }$ $=$ \( 2 a + 9 + \left(10 a + 8\right)\cdot 11 + \left(8 a + 2\right)\cdot 11^{2} + \left(8 a + 1\right)\cdot 11^{3} + \left(a + 5\right)\cdot 11^{4} +O(11^{5})\)  Toggle raw display

Generators of the action on the roots $r_1, \ldots, r_{ 5 }$

Cycle notation
$(1,3)(2,5)$
$(1,2)(4,5)$

Character values on conjugacy classes

SizeOrderAction on $r_1, \ldots, r_{ 5 }$ Character value
$1$$1$$()$$2$
$5$$2$$(1,3)(2,5)$$0$
$2$$5$$(1,5,4,2,3)$$-\zeta_{5}^{3} - \zeta_{5}^{2} - 1$
$2$$5$$(1,4,3,5,2)$$\zeta_{5}^{3} + \zeta_{5}^{2}$

The blue line marks the conjugacy class containing complex conjugation.