Abelian variety isogeny class 2.17.e_bh over $\F_{17}$

• Label: 2.17.e_bh
• Base field: $\F_{17}$
• 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:	$\F_{17}$
Dimension:	$2$
L-polynomial:	$1 + 4 x + 33 x^{2} + 68 x^{3} + 289 x^{4}$
Frobenius angles:	$\pm0.490886355420$, $\pm0.671725076155$
Angle rank:	$2$ (numerical)
Number field:	4.0.85025.1
Galois group:	$D_{4}$
Jacobians:	$20$
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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$395$	$99145$	$23516720$	$6954526025$	$2016967574875$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$22$	$340$	$4786$	$83268$	$1420542$	$24137470$	$410370766$	$6975659268$	$118587019282$	$2015998415700$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 20 curves (of which all are hyperelliptic):

• $y^2=15 x^6+15 x^5+11 x^4+7 x^2+10 x+15$
• $y^2=9 x^6+4 x^5+9 x^4+5 x^3+3 x^2+9 x+2$
• $y^2=8 x^6+3 x^5+14 x^4+14 x^3+x^2+6 x+11$
• $y^2=15 x^6+8 x^5+13 x^4+13 x^3+5 x^2+16 x+13$
• $y^2=12 x^6+14 x^5+14 x^4+7 x^3+16 x^2+6 x+1$
• $y^2=16 x^6+9 x^4+14 x^3+10 x^2+7 x+2$
• $y^2=x^6+2 x^5+15 x^4+4 x^3+7 x^2+x+16$
• $y^2=10 x^6+9 x^5+3 x^4+6 x^3+4 x^2+5 x+15$
• $y^2=x^6+9 x^5+5 x^4+10 x^3+9 x^2+3 x+5$
• $y^2=13 x^6+11 x^5+13 x^4+16 x^3+14 x^2+5 x+15$
• $y^2=12 x^6+9 x^5+4 x^4+14 x^3+2 x^2+2 x+10$
• $y^2=15 x^6+2 x^5+14 x^4+x^2+12 x+12$
• $y^2=12 x^6+12 x^5+13 x^4+16 x^3+11 x^2+10 x+1$
• $y^2=8 x^6+15 x^5+9 x^4+2 x^3+4 x^2+8 x+3$
• $y^2=5 x^6+16 x^4+3 x^3+2 x^2+3 x+4$
• $y^2=16 x^6+14 x^5+5 x^4+2 x^3+6 x+2$
• $y^2=14 x^6+9 x^5+7 x^4+2 x^3+3 x^2+6$
• $y^2=8 x^6+2 x^5+6 x^4+6 x^3+5 x^2+x+5$
• $y^2=12 x^6+12 x^5+13 x^4+16 x^3+3 x^2+5 x+8$
• $y^2=15 x^6+15 x^5+2 x^4+5 x^3+7 x^2+5 x+10$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{17}$.

Endomorphism algebra over $\F_{17}$

The endomorphism algebra of this simple isogeny class is 4.0.85025.1.

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
2.17.ae_bh	$2$	(not in LMFDB)