# Properties

 Label 2.3.a_g Base Field $\F_{3}$ Dimension $2$ Ordinary No $p$-rank $0$ Principally polarizable Yes Contains a Jacobian No

## Invariants

 Base field: $\F_{3}$ Dimension: $2$ L-polynomial: $( 1 + 3 x^{2} )^{2}$ Frobenius angles: $\pm0.5$, $\pm0.5$ Angle rank: $0$ (numerical) Jacobians: 0

This isogeny class is not simple.

## Newton polygon

This isogeny class is supersingular.

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

## Point counts

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

 $r$ 1 2 3 4 5 6 7 8 9 10 $A(\F_{q^r})$ 16 256 784 4096 59536 614656 4787344 40960000 387459856 3544535296

 $r$ 1 2 3 4 5 6 7 8 9 10 $C(\F_{q^r})$ 4 22 28 46 244 838 2188 6238 19684 60022

## Decomposition and endomorphism algebra

Endomorphism algebra over $\F_{3}$
 The isogeny class factors as 1.3.a 2 and its endomorphism algebra is $\mathrm{M}_{2}($$$\Q(\sqrt{-3})$$$)$
Endomorphism algebra over $\overline{\F}_{3}$
 The base change of $A$ to $\F_{3^{2}}$ is 1.9.g 2 and its endomorphism algebra is $\mathrm{M}_{2}(B)$, where $B$ is the quaternion algebra over $$\Q$$ ramified at $3$ and $\infty$.
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.
 Twist Extension Degree Common base change 2.3.ag_p $3$ 2.27.a_cc 2.3.ad_g $3$ 2.27.a_cc 2.3.a_ad $3$ 2.27.a_cc 2.3.d_g $3$ 2.27.a_cc 2.3.g_p $3$ 2.27.a_cc
Below is a list of all twists of this isogeny class.
 Twist Extension Degree Common base change 2.3.ag_p $3$ 2.27.a_cc 2.3.ad_g $3$ 2.27.a_cc 2.3.a_ad $3$ 2.27.a_cc 2.3.d_g $3$ 2.27.a_cc 2.3.g_p $3$ 2.27.a_cc 2.3.a_ag $4$ 2.81.abk_ss 2.3.a_ad $6$ 2.729.ee_gmg 2.3.a_a $8$ (not in LMFDB) 2.3.a_d $12$ (not in LMFDB)