# Properties

 Label 2.3.a_af Base field $\F_{3}$ Dimension $2$ $p$-rank $2$ Ordinary yes Supersingular no Simple yes Geometrically simple no Primitive yes Principally polarizable yes Contains a Jacobian no

## Invariants

 Base field: $\F_{3}$ Dimension: $2$ L-polynomial: $1 - 5 x^{2} + 9 x^{4}$ Frobenius angles: $\pm0.0932147493387$, $\pm0.906785250661$ Angle rank: $1$ (numerical) Number field: $$\Q(i, \sqrt{11})$$ Galois group: $C_2^2$ Jacobians: 0

This isogeny class is simple but not geometrically simple.

## Newton polygon

This isogeny class is ordinary.

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

## Point counts

This isogeny class is principally polarizable, but does not contain a Jacobian.

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $5$ $25$ $740$ $5625$ $59525$

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $4$ $0$ $28$ $68$ $244$ $750$ $2188$ $6788$ $19684$ $60000$

## Decomposition and endomorphism algebra

Endomorphism algebra over $\F_{3}$
 The endomorphism algebra of this simple isogeny class is $$\Q(i, \sqrt{11})$$.
Endomorphism algebra over $\overline{\F}_{3}$
 The base change of $A$ to $\F_{3^{2}}$ is 1.9.af 2 and its endomorphism algebra is $\mathrm{M}_{2}($$$\Q(\sqrt{-11})$$$)$
All geometric endomorphisms are defined over $\F_{3^{2}}$.

## Base change

This is a primitive isogeny class.

## Twists

Below are some of the twists of this isogeny class.
TwistExtension degreeCommon base change
2.3.ac_h$4$2.81.ao_id
2.3.a_f$4$2.81.ao_id
2.3.c_h$4$2.81.ao_id
Below is a list of all twists of this isogeny class.
TwistExtension degreeCommon base change
2.3.ac_h$4$2.81.ao_id
2.3.a_f$4$2.81.ao_id
2.3.c_h$4$2.81.ao_id
2.3.ab_ac$12$(not in LMFDB)
2.3.b_ac$12$(not in LMFDB)