Abelian variety isogeny class 2.49.aw_ic over $\F_{7^{2}}$

• Label: 2.49.aw_ic
• Base field: $\F_{7^{2}}$
• Dimension: $2$
• $p$-rank: $1$
• Ordinary: no
• Supersingular: no
• Simple: no
• Geometrically simple: no
• Primitive: yes
• Principally polarizable: yes
• Contains a Jacobian: no

Invariants

Base field:	$\F_{7^{2}}$
Dimension:	$2$
L-polynomial:	$( 1 - 7 x )^{2}( 1 - 8 x + 49 x^{2} )$
	$1 - 22 x + 210 x^{2} - 1078 x^{3} + 2401 x^{4}$
Frobenius angles:	$0$, $0$, $\pm0.306389419005$
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:	$1$
Slopes:	$[0, 1/2, 1/2, 1]$

Point counts

Point counts of the abelian variety

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$1512$	$5612544$	$13838478696$	$33226260480000$	$79781820476078952$

Point counts of the (virtual) curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$28$	$2338$	$117628$	$5763646$	$282438268$	$13840846306$	$678219946012$	$33232917276286$	$1628413575601372$	$79792266286268578$

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 $\F_{7^{2}}$.

Endomorphism algebra over $\F_{7^{2}}$

The isogeny class factors as 1.49.ao $\times$ 1.49.ai and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:

• 1.49.ao : the quaternion algebra over \(\Q\) ramified at $7$ and $\infty$.
• 1.49.ai : \(\Q(\sqrt{-33}) \).

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
2.49.ag_ao	$2$	(not in LMFDB)
2.49.g_ao	$2$	(not in LMFDB)
2.49.w_ic	$2$	(not in LMFDB)