Abelian variety isogeny class 2.67.a_aeo over $\F_{67}$

• Label: 2.67.a_aeo
• Base field: $\F_{67}$
• Dimension: $2$
• $p$-rank: $2$
• Ordinary: yes
• Supersingular: no
• Simple: yes
• Geometrically simple: no
• Primitive: yes
• Principally polarizable: yes
• Contains a Jacobian: yes

Invariants

Base field:	$\F_{67}$
Dimension:	$2$
L-polynomial:	$1 - 118 x^{2} + 4489 x^{4}$
Frobenius angles:	$\pm0.0785709304621$, $\pm0.921429069538$
Angle rank:	$1$ (numerical)
Number field:	\(\Q(i, \sqrt{7})\)
Galois group:	$C_2^2$
Jacobians:	$65$

This isogeny class is simple but not 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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$4372$	$19114384$	$90458328244$	$405868407422976$	$1822837806662875732$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$68$	$4254$	$300764$	$20141230$	$1350125108$	$90458274318$	$6060711605324$	$406067709235294$	$27206534396294948$	$1822837808773990014$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 65 curves (of which all are hyperelliptic):

• $y^2=11 x^6+38 x^5+59 x^4+30 x^3+66 x^2+32 x+47$
• $y^2=36 x^6+24 x^5+10 x^4+49 x^3+61 x^2+14 x+41$
• $y^2=51 x^6+11 x^5+18 x^4+46 x^3+27 x^2+64 x+31$
• $y^2=50 x^6+x^5+16 x^4+41 x^3+5 x^2+55 x+24$
• $y^2=51 x^6+4 x^5+52 x^3+33 x+10$
• $y^2=8 x^6+33 x^5+50 x^4+25 x^3+x^2+59 x+24$
• $y^2=8 x^6+39 x^5+4 x^4+33 x^2+13 x+45$
• $y^2=60 x^6+24 x^5+63 x^4+37 x^3+44 x^2+23 x+14$
• $y^2=53 x^6+48 x^5+59 x^4+7 x^3+21 x^2+46 x+28$
• $y^2=5 x^6+56 x^5+17 x^4+46 x^3+57 x^2+21 x+59$
• $y^2=20 x^6+12 x^5+13 x^4+66 x^3+44 x^2+39 x+66$
• $y^2=40 x^6+15 x^5+56 x^4+2 x^3+27 x^2+65 x+51$
• $y^2=13 x^6+30 x^5+45 x^4+4 x^3+54 x^2+63 x+35$
• $y^2=49 x^6+26 x^4+3 x^3+45 x^2+2$
• $y^2=35 x^6+24 x^5+37 x^4+50 x^2+22 x+34$
• $y^2=54 x^6+26 x^5+2 x^4+61 x^3+26 x^2+42 x+42$
• $y^2=41 x^6+52 x^5+4 x^4+55 x^3+52 x^2+17 x+17$
• $y^2=x^6+31 x^5+26 x^4+11 x^3+19 x^2+24 x+3$
• $y^2=2 x^6+62 x^5+52 x^4+22 x^3+38 x^2+48 x+6$
• $y^2=41 x^6+44 x^5+10 x^4+57 x^3+6 x^2+53 x+61$
• and

• $y^2=15 x^6+21 x^5+20 x^4+47 x^3+12 x^2+39 x+55$
• $y^2=x^6+24 x^5+15 x^4+65 x^3+32 x^2+53 x+57$
• $y^2=2 x^6+48 x^5+30 x^4+63 x^3+64 x^2+39 x+47$
• $y^2=40 x^6+36 x^5+22 x^4+24 x^2+38 x+25$
• $y^2=28 x^5+53 x^4+47 x^3+4 x^2+33 x+40$
• $y^2=56 x^5+39 x^4+27 x^3+8 x^2+66 x+13$
• $y^2=33 x^6+64 x^5+x^4+21 x^3+56 x^2+54 x+7$
• $y^2=66 x^6+61 x^5+2 x^4+42 x^3+45 x^2+41 x+14$
• $y^2=29 x^6+26 x^5+3 x^4+45 x^3+25 x^2+4 x+20$
• $y^2=18 x^6+13 x^5+8 x^4+46 x^3+41 x^2+41 x+43$
• $y^2=20 x^6+44 x^5+17 x^4+21 x^3+23 x^2+2 x+65$
• $y^2=40 x^6+21 x^5+34 x^4+42 x^3+46 x^2+4 x+63$
• $y^2=64 x^6+53 x^5+17 x^4+16 x^3+36 x^2+8 x+50$
• $y^2=61 x^6+39 x^5+34 x^4+32 x^3+5 x^2+16 x+33$
• $y^2=33 x^6+16 x^5+11 x^4+17 x^3+35 x^2+23 x+63$
• $y^2=18 x^6+54 x^5+57 x^4+44 x^3+40 x^2+66 x+59$
• $y^2=38 x^6+6 x^5+49 x^4+10 x^2+18 x+41$
• $y^2=54 x^6+58 x^5+59 x^4+9 x^3+53 x^2+52 x+57$
• $y^2=60 x^6+23 x^5+44 x^4+31 x^2+66 x+36$
• $y^2=46 x^6+4 x^5+42 x^4+53 x^3+28 x^2+18 x+55$
• $y^2=25 x^6+8 x^5+17 x^4+39 x^3+56 x^2+36 x+43$
• $y^2=53 x^6+39 x^5+3 x^4+13 x^2+27 x+42$
• $y^2=23 x^6+19 x^5+36 x^3+8 x^2+39 x+52$
• $y^2=46 x^6+38 x^5+5 x^3+16 x^2+11 x+37$
• $y^2=8 x^6+5 x^5+7 x^4+34 x^3+4 x^2+3 x+64$
• $y^2=34 x^6+62 x^5+55 x^4+14 x^2+31 x+31$
• $y^2=7 x^6+22 x^5+37 x^4+30 x^3+51 x^2+14 x+4$
• $y^2=63 x^6+50 x^5+55 x^4+19 x^3+66 x^2+5 x+29$
• $y^2=55 x^6+5 x^5+34 x^4+50 x^3+24 x^2+62 x+61$
• $y^2=43 x^6+10 x^5+x^4+33 x^3+48 x^2+57 x+55$
• $y^2=40 x^6+10 x^5+48 x^4+60 x^3+62 x^2+56 x+66$
• $y^2=12 x^6+x^5+5 x^4+52 x^3+65 x^2+35 x+33$
• $y^2=9 x^6+18 x^5+36 x^4+33 x^3+30 x^2+46 x+8$
• $y^2=65 x^6+61 x^5+56 x^4+28 x^3+27 x^2+53 x+48$
• $y^2=64 x^6+25 x^5+32 x^4+54 x^3+17 x^2+10 x+27$
• $y^2=38 x^6+24 x^5+40 x^4+56 x^2+28 x+63$
• $y^2=18 x^6+4 x^5+3 x^4+53 x^2+32 x+2$
• $y^2=61 x^6+60 x^5+2 x^4+14 x^3+21 x^2+25 x+31$
• $y^2=55 x^6+53 x^5+4 x^4+28 x^3+42 x^2+50 x+62$
• $y^2=64 x^6+21 x^5+15 x^4+36 x^2+5 x+40$
• $y^2=41 x^6+54 x^5+15 x^4+6 x^2+53 x+38$
• $y^2=25 x^6+8 x^5+12 x^4+30 x^3+55 x^2+16 x+22$
• $y^2=50 x^6+16 x^5+24 x^4+60 x^3+43 x^2+32 x+44$
• $y^2=31 x^6+62 x^5+43 x^4+14 x^3+9 x^2+15 x+60$
• $y^2=32 x^6+20 x^5+36 x^4+60 x^3+42 x^2+57 x+26$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{67^{2}}$.

Endomorphism algebra over $\F_{67}$

The endomorphism algebra of this simple isogeny class is \(\Q(i, \sqrt{7})\).

Endomorphism algebra over $\overline{\F}_{67}$

The base change of $A$ to $\F_{67^{2}}$ is 1.4489.aeo^2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-7}) \)$)$

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
2.67.ai_fu	$4$	(not in LMFDB)
2.67.a_eo	$4$	(not in LMFDB)
2.67.i_fu	$4$	(not in LMFDB)