Abelian variety isogeny class 3.3.af_q_abh over $\F_{3}$

• Label: 3.3.af_q_abh
• Base field: $\F_{3}$
• Dimension: $3$
• $p$-rank: $2$
• Ordinary: no
• Supersingular: no
• Simple: no
• Geometrically simple: no
• Primitive: yes
• Principally polarizable: yes
• Contains a Jacobian: no

Invariants

Base field:	$\F_{3}$
Dimension:	$3$
L-polynomial:	$( 1 - 3 x + 3 x^{2} )( 1 - x + 3 x^{2} )^{2}$
	$1 - 5 x + 16 x^{2} - 33 x^{3} + 48 x^{4} - 45 x^{5} + 27 x^{6}$
Frobenius angles:	$\pm0.166666666667$, $\pm0.406785250661$, $\pm0.406785250661$
Angle rank:	$1$ (numerical)
Jacobians:	$0$

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

Newton polygon

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

Point counts

Point counts of the abelian variety

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$9$	$1575$	$36288$	$511875$	$12294999$

Point counts of the (virtual) curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$-1$	$17$	$44$	$77$	$209$	$764$	$2435$	$6869$	$19412$	$57857$

Jacobians and polarizations

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

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{3^{6}}$.

Endomorphism algebra over $\F_{3}$

The isogeny class factors as 1.3.ad $\times$ 1.3.ab^2 and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:

• 1.3.ad : \(\Q(\sqrt{-3}) \).
• 1.3.ab^2 : $\mathrm{M}_{2}($\(\Q(\sqrt{-11}) \)$)$

Endomorphism algebra over $\overline{\F}_{3}$

The base change of $A$ to $\F_{3^{6}}$ is 1.729.ak^2 $\times$ 1.729.cc. The endomorphism algebra for each factor is:

• 1.729.ak^2 : $\mathrm{M}_{2}($\(\Q(\sqrt{-11}) \)$)$
• 1.729.cc : the quaternion algebra over \(\Q\) ramified at $3$ and $\infty$.

Remainder of endomorphism lattice by field

• Endomorphism algebra over $\F_{3^{2}}$
  The base change of $A$ to $\F_{3^{2}}$ is 1.9.ad $\times$ 1.9.f^2. The endomorphism algebra for each factor is:

  • 1.9.ad : \(\Q(\sqrt{-3}) \).
  • 1.9.f^2 : $\mathrm{M}_{2}($\(\Q(\sqrt{-11}) \)$)$
• Endomorphism algebra over $\F_{3^{3}}$
  The base change of $A$ to $\F_{3^{3}}$ is 1.27.a $\times$ 1.27.i^2. The endomorphism algebra for each factor is:

  • 1.27.a : \(\Q(\sqrt{-3}) \).
  • 1.27.i^2 : $\mathrm{M}_{2}($\(\Q(\sqrt{-11}) \)$)$

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
3.3.ad_i_ap	$2$	3.9.h_w_bz
3.3.ab_e_aj	$2$	3.9.h_w_bz
3.3.d_i_p	$2$	3.9.h_w_bz
3.3.f_q_bh	$2$	3.9.h_w_bz
3.3.ac_ac_m	$3$	(not in LMFDB)
3.3.ac_k_am	$3$	(not in LMFDB)
3.3.b_b_g	$3$	(not in LMFDB)
3.3.b_e_j	$3$	(not in LMFDB)
3.3.e_e_a	$3$	(not in LMFDB)