Properties

Label 2.47.e_de
Base field $\F_{47}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple no
Geometrically simple no
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

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Invariants

Base field:  $\F_{47}$
Dimension:  $2$
L-polynomial:  $( 1 - 2 x + 47 x^{2} )( 1 + 6 x + 47 x^{2} )$
  $1 + 4 x + 82 x^{2} + 188 x^{3} + 2209 x^{4}$
Frobenius angles:  $\pm0.453403488155$, $\pm0.644169619151$
Angle rank:  $2$ (numerical)
Jacobians:  $192$

This isogeny class is not simple, primitive, ordinary, and not supersingular. It is principally polarizable and contains a Jacobian.

Newton polygon

This isogeny class is ordinary.

$p$-rank:  $2$
Slopes:  $[0, 0, 1, 1]$

Point counts

Point counts of the abelian variety

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $2484$ $5216400$ $10742289012$ $23798468736000$ $52599830349369204$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $52$ $2358$ $103468$ $4877054$ $229348052$ $10779158646$ $506624378060$ $23811291512446$ $1119130354509556$ $52599132201233718$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 192 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{47}$.

Endomorphism algebra over $\F_{47}$
The isogeny class factors as 1.47.ac $\times$ 1.47.g and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:

Base change

This is a primitive isogeny class.

Twists

Below is a list of all twists of this isogeny class.

TwistExtension degreeCommon base change
2.47.ai_ec$2$(not in LMFDB)
2.47.ae_de$2$(not in LMFDB)
2.47.i_ec$2$(not in LMFDB)