Properties

Label 3.2.a_c_ac
Base field $\F_{2}$
Dimension $3$
$p$-rank $0$
Ordinary no
Supersingular no
Simple yes
Geometrically simple yes
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

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Invariants

Base field:  $\F_{2}$
Dimension:  $3$
L-polynomial:  $1 + 2 x^{2} - 2 x^{3} + 4 x^{4} + 8 x^{6}$
Frobenius angles:  $\pm0.213749719877$, $\pm0.561053735811$, $\pm0.701759500313$
Angle rank:  $3$ (numerical)
Number field:  6.0.679024.1
Galois group:  $S_4\times C_2$
Jacobians:  $1$
Cyclic group of points:    yes

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

Newton polygon

$p$-rank:  $0$
Slopes:  $[1/3, 1/3, 1/3, 2/3, 2/3, 2/3]$

Point counts

Point counts of the abelian variety

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $13$ $221$ $247$ $6409$ $60853$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $3$ $9$ $3$ $25$ $53$ $69$ $129$ $225$ $489$ $1009$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobian of 1 curve (which is hyperelliptic):

  • $y^2+y=x^7+x^6+x^4+1$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{2}$.

Endomorphism algebra over $\F_{2}$
The endomorphism algebra of this simple isogeny class is 6.0.679024.1.

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
3.2.a_c_c$2$3.4.e_m_bc