Abelian variety isogeny class 3.13.ap_ef_asu over $\F_{13}$

• Label: 3.13.ap_ef_asu
• Base field: $\F_{13}$
• Dimension: $3$
• $p$-rank: $3$
• Ordinary: yes
• Supersingular: no
• Simple: no
• Geometrically simple: no
• Primitive: yes
• Principally polarizable: yes
• Contains a Jacobian: no

Invariants

Base field:	$\F_{13}$
Dimension:	$3$
L-polynomial:	$( 1 - 7 x + 13 x^{2} )( 1 - 8 x + 40 x^{2} - 104 x^{3} + 169 x^{4} )$
	$1 - 15 x + 109 x^{2} - 488 x^{3} + 1417 x^{4} - 2535 x^{5} + 2197 x^{6}$
Frobenius angles:	$\pm0.0772104791556$, $\pm0.229660330050$, $\pm0.383259645523$
Angle rank:	$3$ (numerical)

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

Newton polygon

This isogeny class is ordinary.

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

Point counts

Point counts of the abelian variety

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$686$	$4638732$	$10926245792$	$23381009108016$	$51114847857411366$

Point counts of the (virtual) curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$-1$	$163$	$2264$	$28663$	$370779$	$4825360$	$62753879$	$815757439$	$10604448968$	$137857967003$

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 $\F_{13}$.

Endomorphism algebra over $\F_{13}$

The isogeny class factors as 1.13.ah $\times$ 2.13.ai_bo and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:

• 1.13.ah : \(\Q(\sqrt{-3}) \).
• 2.13.ai_bo : 4.0.65792.3.

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
3.13.ab_ad_cu	$2$	(not in LMFDB)
3.13.b_ad_acu	$2$	(not in LMFDB)
3.13.p_ef_su	$2$	(not in LMFDB)
3.13.ag_bl_aey	$3$	(not in LMFDB)
3.13.ad_n_ai	$3$	(not in LMFDB)