Properties

Label 2.43.ae_bk
Base field $\F_{43}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple yes
Geometrically simple yes
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

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Invariants

Base field:  $\F_{43}$
Dimension:  $2$
L-polynomial:  $1 - 4 x + 36 x^{2} - 172 x^{3} + 1849 x^{4}$
Frobenius angles:  $\pm0.247420324247$, $\pm0.633709849622$
Angle rank:  $2$ (numerical)
Number field:  4.0.776448.1
Galois group:  $D_{4}$
Jacobians:  $136$
Isomorphism classes:  168

This isogeny class is simple and geometrically 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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $1710$ $3526020$ $6309546030$ $11702225696400$ $21617180439659550$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $40$ $1906$ $79360$ $3422902$ $147047200$ $6321241474$ $271817708440$ $11688200128798$ $502592551266760$ $21611482145495986$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 136 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{43}$.

Endomorphism algebra over $\F_{43}$
The endomorphism algebra of this simple isogeny class is 4.0.776448.1.

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.43.e_bk$2$(not in LMFDB)