Abelian variety isogeny class 2.89.a_adv over $\F_{89}$

• Label: 2.89.a_adv
• Base field: $\F_{89}$
• 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:	$\F_{89}$
Dimension:	$2$
L-polynomial:	$1 - 99 x^{2} + 7921 x^{4}$
Frobenius angles:	$\pm0.156133296464$, $\pm0.843866703536$
Angle rank:	$1$ (numerical)
Number field:	\(\Q(\sqrt{-79}, \sqrt{277})\)
Galois group:	$C_2^2$
Jacobians:	$90$
Isomorphism classes:	100
Cyclic group of points:	yes

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$7823$	$61199329$	$496982673200$	$3937347019448089$	$31181719927827565703$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$90$	$7724$	$704970$	$62754324$	$5584059450$	$496984055438$	$44231334895530$	$3936588983683684$	$350356403707485210$	$31181719925688947804$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 90 curves (of which all are hyperelliptic):

• $y^2=6 x^6+45 x^5+8 x^4+17 x^3+16 x^2+82 x+5$
• $y^2=18 x^6+46 x^5+24 x^4+51 x^3+48 x^2+68 x+15$
• $y^2=65 x^6+24 x^5+21 x^4+43 x^3+30 x^2+79 x+9$
• $y^2=17 x^6+72 x^5+63 x^4+40 x^3+x^2+59 x+27$
• $y^2=31 x^6+21 x^5+5 x^4+54 x^3+25 x^2+22 x+44$
• $y^2=4 x^6+63 x^5+15 x^4+73 x^3+75 x^2+66 x+43$
• $y^2=62 x^6+21 x^5+60 x^4+23 x^3+74 x^2+20 x+40$
• $y^2=8 x^6+63 x^5+2 x^4+69 x^3+44 x^2+60 x+31$
• $y^2=28 x^6+78 x^5+61 x^4+23 x^3+85 x^2+36 x+46$
• $y^2=84 x^6+56 x^5+5 x^4+69 x^3+77 x^2+19 x+49$
• $y^2=14 x^6+39 x^5+73 x^4+67 x^3+67 x^2+33 x+36$
• $y^2=42 x^6+28 x^5+41 x^4+23 x^3+23 x^2+10 x+19$
• $y^2=14 x^6+46 x^5+58 x^4+33 x^3+48 x^2+26 x+81$
• $y^2=80 x^6+35 x^5+64 x^4+49 x^3+37 x^2+49 x+67$
• $y^2=62 x^6+16 x^5+14 x^4+58 x^3+22 x^2+58 x+23$
• $y^2=7 x^6+3 x^5+48 x^4+6 x^3+17 x^2+65 x+10$
• $y^2=21 x^6+9 x^5+55 x^4+18 x^3+51 x^2+17 x+30$
• $y^2=10 x^6+31 x^5+43 x^4+51 x^3+52 x^2+60 x+82$
• $y^2=10 x^6+19 x^5+2 x^4+77 x^3+24 x^2+43 x+35$
• $y^2=30 x^6+57 x^5+6 x^4+53 x^3+72 x^2+40 x+16$
• and

• $y^2=86 x^6+76 x^5+82 x^4+30 x^3+52 x+78$
• $y^2=80 x^6+50 x^5+68 x^4+x^3+67 x+56$
• $y^2=2 x^6+67 x^5+50 x^4+64 x^3+14 x^2+6 x+60$
• $y^2=6 x^6+23 x^5+61 x^4+14 x^3+42 x^2+18 x+2$
• $y^2=86 x^6+81 x^5+30 x^3+84 x^2+67 x+84$
• $y^2=80 x^6+65 x^5+x^3+74 x^2+23 x+74$
• $y^2=28 x^6+18 x^5+23 x^4+24 x^3+12 x^2+62 x+69$
• $y^2=84 x^6+54 x^5+69 x^4+72 x^3+36 x^2+8 x+29$
• $y^2=10 x^6+47 x^5+87 x^4+44 x^3+45 x^2+39 x+81$
• $y^2=30 x^6+52 x^5+83 x^4+43 x^3+46 x^2+28 x+65$
• $y^2=61 x^6+2 x^5+51 x^4+78 x^3+21 x^2+12 x+37$
• $y^2=35 x^6+36 x^5+13 x^4+12 x^3+51 x^2+37 x+25$
• $y^2=16 x^6+19 x^5+39 x^4+36 x^3+64 x^2+22 x+75$
• $y^2=40 x^6+38 x^5+63 x^4+3 x^3+59 x^2+67 x+27$
• $y^2=31 x^6+25 x^5+11 x^4+9 x^3+88 x^2+23 x+81$
• $y^2=64 x^6+58 x^5+32 x^4+20 x^3+44 x^2+78$
• $y^2=67 x^6+22 x^5+77 x^4+35 x^3+71 x^2+46 x+27$
• $y^2=23 x^6+66 x^5+53 x^4+16 x^3+35 x^2+49 x+81$
• $y^2=8 x^6+49 x^5+18 x^4+46 x^3+77 x^2+6 x+47$
• $y^2=24 x^6+58 x^5+54 x^4+49 x^3+53 x^2+18 x+52$
• $y^2=20 x^6+66 x^5+42 x^4+25 x^3+64 x^2+32 x+57$
• $y^2=60 x^6+20 x^5+37 x^4+75 x^3+14 x^2+7 x+82$
• $y^2=23 x^6+50 x^5+50 x^4+14 x^3+8 x^2+44 x+11$
• $y^2=69 x^6+61 x^5+61 x^4+42 x^3+24 x^2+43 x+33$
• $y^2=69 x^6+52 x^4+28 x^3+40 x^2+24 x+39$
• $y^2=29 x^6+67 x^4+84 x^3+31 x^2+72 x+28$
• $y^2=64 x^6+8 x^5+4 x^4+63 x^3+72 x^2+47 x+66$
• $y^2=29 x^6+41 x^5+43 x^4+69 x^3+19 x^2+73 x+36$
• $y^2=87 x^6+34 x^5+40 x^4+29 x^3+57 x^2+41 x+19$
• $y^2=71 x^6+55 x^5+66 x^4+56 x^3+37 x^2+30 x+13$
• $y^2=35 x^6+76 x^5+20 x^4+79 x^3+22 x^2+x+39$
• $y^2=19 x^6+12 x^5+59 x^4+36 x^3+79 x^2+52 x+36$
• $y^2=57 x^6+36 x^5+88 x^4+19 x^3+59 x^2+67 x+19$
• $y^2=41 x^6+12 x^5+71 x^4+55 x^3+34 x^2+76 x+76$
• $y^2=46 x^6+10 x^5+31 x^4+10 x^3+27 x^2+66 x+8$
• $y^2=68 x^6+20 x^5+53 x^4+28 x^3+25 x^2+32 x+84$
• $y^2=26 x^6+60 x^5+70 x^4+84 x^3+75 x^2+7 x+74$
• $y^2=22 x^6+39 x^5+47 x^4+31 x^3+83 x^2+51 x+33$
• $y^2=26 x^6+70 x^5+76 x^4+49 x^3+x^2+18 x+42$
• $y^2=78 x^6+32 x^5+50 x^4+58 x^3+3 x^2+54 x+37$
• $y^2=38 x^6+84 x^5+46 x^4+65 x^3+6 x^2+x+74$
• $y^2=25 x^6+74 x^5+49 x^4+17 x^3+18 x^2+3 x+44$
• $y^2=35 x^6+78 x^5+12 x^4+12 x^3+60 x^2+55 x+37$
• $y^2=16 x^6+56 x^5+36 x^4+36 x^3+2 x^2+76 x+22$
• $y^2=14 x^6+61 x^5+53 x^4+12 x^3+20 x^2+24 x+61$
• $y^2=42 x^6+5 x^5+70 x^4+36 x^3+60 x^2+72 x+5$
• $y^2=39 x^6+53 x^5+66 x^4+82 x^3+53 x^2+27 x+84$
• $y^2=28 x^6+70 x^5+20 x^4+68 x^3+70 x^2+81 x+74$
• $y^2=64 x^6+26 x^5+63 x^4+87 x^3+63 x^2+42 x+64$
• $y^2=14 x^6+78 x^5+11 x^4+83 x^3+11 x^2+37 x+14$
• $y^2=81 x^6+37 x^5+7 x^4+13 x^3+45 x^2+18 x+32$
• $y^2=65 x^6+22 x^5+21 x^4+39 x^3+46 x^2+54 x+7$
• $y^2=67 x^6+8 x^5+63 x^4+48 x^3+17 x^2+34 x+65$
• $y^2=23 x^6+24 x^5+11 x^4+55 x^3+51 x^2+13 x+17$
• $y^2=10 x^6+75 x^5+71 x^4+86 x^3+74 x^2+38 x+39$
• $y^2=30 x^6+47 x^5+35 x^4+80 x^3+44 x^2+25 x+28$
• $y^2=66 x^6+16 x^5+63 x^3+29 x^2+5 x+59$
• $y^2=20 x^6+48 x^5+11 x^3+87 x^2+15 x+88$
• $y^2=64 x^6+8 x^5+63 x^4+10 x^3+78 x^2+41 x+67$
• $y^2=33 x^6+84 x^5+19 x^4+56 x^3+73 x^2+49 x+12$
• $y^2=10 x^6+74 x^5+57 x^4+79 x^3+41 x^2+58 x+36$
• $y^2=72 x^6+32 x^5+69 x^4+9 x^3+68 x^2+27 x+76$
• $y^2=38 x^6+7 x^5+29 x^4+27 x^3+26 x^2+81 x+50$
• $y^2=62 x^6+53 x^5+35 x^4+50 x^3+41 x^2+43 x+34$
• $y^2=8 x^6+70 x^5+16 x^4+61 x^3+34 x^2+40 x+13$
• $y^2=40 x^6+26 x^5+84 x^4+46 x^3+76 x^2+54 x+1$
• $y^2=52 x^6+4 x^5+86 x^4+83 x^3+62 x^2+52 x+88$
• $y^2=67 x^6+12 x^5+80 x^4+71 x^3+8 x^2+67 x+86$
• $y^2=9 x^6+82 x^5+76 x^4+69 x^3+65 x^2+23 x+56$
• $y^2=27 x^6+68 x^5+50 x^4+29 x^3+17 x^2+69 x+79$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{89^{2}}$.

Endomorphism algebra over $\F_{89}$

The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-79}, \sqrt{277})\).

Endomorphism algebra over $\overline{\F}_{89}$

The base change of $A$ to $\F_{89^{2}}$ is 1.7921.adv^2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-21883}) \)$)$

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
2.89.a_dv	$4$	(not in LMFDB)