Abelian variety isogeny class 1.23.ag over $\F_{23}$

• Label: 1.23.ag
• Base field: $\F_{23}$
• Dimension: $1$
• $p$-rank: $1$
• Ordinary: yes
• Supersingular: no
• Simple: yes
• Geometrically simple: yes
• Primitive: yes
• Principally polarizable: yes
• Contains a Jacobian: yes

Invariants

Base field:	$\F_{23}$
Dimension:	$1$
L-polynomial:	$1 - 6 x + 23 x^{2}$
Frobenius angles:	$\pm0.284877382774$
Angle rank:	$1$ (numerical)
Number field:	\(\Q(\sqrt{-14}) \)
Galois group:	$C_2$
Jacobians:	$4$
Isomorphism classes:	4

This isogeny class is simple and geometrically simple, primitive, ordinary, and not supersingular. It is principally polarizable and contains a Jacobian.

Newton polygon

This isogeny class is ordinary.

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

Point counts

Point counts of the abelian variety

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$18$	$540$	$12366$	$280800$	$6437538$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$18$	$540$	$12366$	$280800$	$6437538$	$148021020$	$3404708766$	$78310627200$	$1801153196658$	$41426522660700$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 4 curves (of which 0 are hyperelliptic):

• $y^2=x^3+11 x+11$
• $y^2=x^3+16 x+11$
• $y^2=x^3+5 x+5$
• $y^2=x^3+17 x+17$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{23}$.

Endomorphism algebra over $\F_{23}$

The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-14}) \).

Base change

This is a primitive isogeny class.

Twists

Below is a list of all twists of this isogeny class.

Twist	Extension degree	Common base change
1.23.g	$2$	(not in LMFDB)