Abelian variety isogeny class 2.11.ad_q over $\F_{11}$

• Label: 2.11.ad_q
• Base field: $\F_{11}$
• 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:	$\F_{11}$
Dimension:	$2$
L-polynomial:	$1 - 3 x + 16 x^{2} - 33 x^{3} + 121 x^{4}$
Frobenius angles:	$\pm0.270917831093$, $\pm0.566330707844$
Angle rank:	$2$ (numerical)
Number field:	4.0.1141272.1
Galois group:	$D_{4}$
Jacobians:	$12$
Isomorphism classes:	12

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$102$	$17748$	$1795608$	$215389728$	$26106613482$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$9$	$145$	$1350$	$14713$	$162099$	$1771378$	$19470033$	$214336369$	$2358021618$	$25937463265$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 12 curves (of which all are hyperelliptic):

• $y^2=6 x^6+5 x^5+9 x^3+9 x^2+8 x+4$
• $y^2=2 x^6+6 x^4+10 x^3+4 x^2+7 x+1$
• $y^2=3 x^6+8 x^5+3 x^4+2 x^3+6 x^2+10 x+8$
• $y^2=10 x^6+2 x^5+5 x^4+4 x^3+x^2+3 x+8$
• $y^2=x^6+x^5+9 x^4+10 x^3+2 x^2+7 x+5$
• $y^2=10 x^6+3 x^5+6 x^4+8 x^3+5 x^2+8$
• $y^2=6 x^6+4 x^5+4 x^4+4 x^3+6 x^2+2 x+4$
• $y^2=x^6+8 x^5+8 x^4+4 x^3+8 x^2+5 x+6$
• $y^2=5 x^6+9 x^5+9 x^4+5 x^2+10 x+7$
• $y^2=x^6+10 x^5+3 x^4+4 x^3+7 x^2+4 x+6$
• $y^2=8 x^6+2 x^5+2 x^4+8 x^3+9 x^2+6 x+2$
• $y^2=6 x^5+8 x^4+7 x^3+3 x^2+5 x+10$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{11}$.

Endomorphism algebra over $\F_{11}$

The endomorphism algebra of this simple isogeny class is 4.0.1141272.1.

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
2.11.d_q	$2$	2.121.x_lo