Abelian variety isogeny class 2.23.d_bo over $\F_{23}$

• Label: 2.23.d_bo
• Base field: $\F_{23}$
• Dimension: $2$
• $p$-rank: $2$
• Ordinary: yes
• Supersingular: no
• Simple: yes
• Geometrically simple: yes
• Primitive: yes
• Principally polarizable: yes
• Contains a Jacobian: yes

Invariants

Base field:	$\F_{23}$
Dimension:	$2$
L-polynomial:	$1 + 3 x + 40 x^{2} + 69 x^{3} + 529 x^{4}$
Frobenius angles:	$\pm0.454302523803$, $\pm0.650661737381$
Angle rank:	$2$ (numerical)
Number field:	4.0.7152552.2
Galois group:	$D_{4}$
Jacobians:	$26$
Cyclic group of points:	yes

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:	$2$
Slopes:	$[0, 0, 1, 1]$

Point counts

Point counts of the abelian variety

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$642$	$319716$	$146506968$	$78156494496$	$41427883178742$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$27$	$601$	$12042$	$279289$	$6436557$	$148028506$	$3404943891$	$78311203153$	$1801147666950$	$41426513215921$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 26 curves (of which all are hyperelliptic):

• $y^2=10 x^6+4 x^4+13 x^3+18 x^2+9 x$
• $y^2=20 x^6+13 x^5+7 x^4+12 x^3+5 x^2+6 x+19$
• $y^2=14 x^6+x^5+2 x^4+x^3+9 x^2+3$
• $y^2=20 x^6+3 x^5+13 x^4+19 x^3+10 x^2+2 x+8$
• $y^2=11 x^6+4 x^5+9 x^4+5 x^3+21 x^2+17 x+20$
• $y^2=x^6+22 x^5+20 x^3+18 x^2+8 x+4$
• $y^2=21 x^6+21 x^5+22 x^4+19 x^3+x^2+21 x+6$
• $y^2=16 x^6+3 x^5+18 x^4+14 x^3+5 x^2+10 x+15$
• $y^2=3 x^6+22 x^5+16 x^4+6 x^3+13 x^2+10 x+12$
• $y^2=17 x^6+13 x^5+3 x^4+3 x^3+5 x^2+6 x+10$
• $y^2=6 x^6+19 x^5+3 x^4+15 x^3+14 x^2+16 x+11$
• $y^2=2 x^6+14 x^5+21 x^4+13 x^3+14 x^2+13 x+15$
• $y^2=6 x^6+14 x^5+2 x^4+20 x^3+18 x^2+16 x+14$
• $y^2=18 x^6+14 x^5+4 x^4+4 x^3+3 x^2+5 x+19$
• $y^2=21 x^6+10 x^5+9 x^4+9 x^3+22 x^2+2 x+2$
• $y^2=16 x^6+18 x^5+15 x^4+19 x^3+4 x^2+5 x+9$
• $y^2=15 x^6+13 x^5+14 x^4+8 x^3+19 x^2+12 x+6$
• $y^2=19 x^6+22 x^5+13 x^4+20 x^3+17 x^2+15 x+8$
• $y^2=22 x^6+17 x^5+12 x^4+17 x^3+18 x^2+14 x+20$
• $y^2=18 x^6+2 x^4+9 x^3+x^2+12 x+9$
• $y^2=14 x^5+2 x^4+13 x^3+4 x^2+16 x+2$
• $y^2=6 x^6+22 x^5+9 x^4+12 x^3+4 x^2+20 x+5$
• $y^2=8 x^6+15 x^5+6 x^4+19 x^3+21 x^2+x+4$
• $y^2=4 x^6+7 x^5+15 x^4+x^3+7 x^2+7 x+18$
• $y^2=6 x^6+18 x^5+9 x^4+8 x^3+7 x+11$
• $y^2=x^6+6 x^5+17 x^4+10 x^3+13 x^2+16 x+12$

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 4.0.7152552.2.

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
2.23.ad_bo	$2$	(not in LMFDB)