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

• Label: 2.89.aba_na
• Base field: $\F_{89}$
• Dimension: $2$
• $p$-rank: $2$
• Ordinary: yes
• Supersingular: no
• Simple: no
• Geometrically simple: no
• Primitive: yes
• Principally polarizable: yes
• Contains a Jacobian: yes

Invariants

Base field:	$\F_{89}$
Dimension:	$2$
L-polynomial:	$( 1 - 16 x + 89 x^{2} )( 1 - 10 x + 89 x^{2} )$
	$1 - 26 x + 338 x^{2} - 2314 x^{3} + 7921 x^{4}$
Frobenius angles:	$\pm0.177807684489$, $\pm0.322192315511$
Angle rank:	$1$ (numerical)
Jacobians:	$98$

This isogeny class is not 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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$5920$	$62752000$	$498284369440$	$3937813504000000$	$31182219227055277600$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$64$	$7922$	$706816$	$62761758$	$5584148864$	$496981290962$	$44231335211456$	$3936588866233918$	$350356404466281664$	$31181719929966183602$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 98 curves (of which all are hyperelliptic):

• $y^2=62 x^6+37 x^5+65 x^4+35 x^3+61 x^2+38 x+35$
• $y^2=51 x^6+75 x^5+57 x^4+5 x^3+37 x^2+49 x+8$
• $y^2=35 x^6+17 x^5+52 x^4+5 x^3+69 x^2+7 x+51$
• $y^2=44 x^6+80 x^5+49 x^4+51 x^3+53 x^2+50 x+15$
• $y^2=60 x^6+23 x^5+21 x^4+82 x^3+37 x^2+76 x+83$
• $y^2=37 x^6+79 x^4+66 x^3+69 x^2+25 x+10$
• $y^2=6 x^6+43 x^5+41 x^4+25 x^3+63 x^2+19 x+77$
• $y^2=62 x^6+70 x^5+20 x^4+67 x^3+59 x^2+15 x+33$
• $y^2=17 x^6+6 x^5+38 x^4+71 x^3+23 x^2+32 x$
• $y^2=24 x^6+46 x^5+19 x^4+34 x^3+14 x^2+41 x+29$
• $y^2=75 x^6+8 x^5+16 x^4+64 x^3+62 x^2+61 x$
• $y^2=55 x^6+26 x^5+21 x^4+28 x^3+49 x^2+79 x+37$
• $y^2=32 x^6+61 x^5+61 x^4+29 x^3+74 x^2+34 x+5$
• $y^2=70 x^6+46 x^5+59 x^4+16 x^3+42 x^2+22 x+15$
• $y^2=38 x^6+38 x^5+48 x^4+54 x^3+13 x^2+73 x+26$
• $y^2=59 x^6+25 x^5+85 x^4+79 x^3+47 x^2+83 x+1$
• $y^2=84 x^6+51 x^5+11 x^4+63 x^3+45 x^2+15 x+53$
• $y^2=13 x^6+37 x^5+31 x^4+53 x^3+46 x^2+82 x+16$
• $y^2=71 x^6+21 x^5+77 x^4+67 x^3+21 x^2+48 x+16$
• $y^2=82 x^6+13 x^5+3 x^4+81 x^3+41 x^2+30 x+4$
• and

• $y^2=62 x^6+7 x^5+88 x^4+52 x^3+47 x^2+32 x+3$
• $y^2=86 x^6+70 x^5+37 x^4+44 x^3+49 x^2+6 x+78$
• $y^2=48 x^6+22 x^5+36 x^4+45 x^3+52 x^2+x+31$
• $y^2=8 x^6+35 x^5+82 x^4+70 x^3+50 x^2+57 x+18$
• $y^2=40 x^6+20 x^5+69 x^4+32 x^3+49 x^2+76 x+13$
• $y^2=49 x^6+86 x^5+20 x^4+10 x^3+77 x^2+21 x+64$
• $y^2=83 x^6+42 x^5+38 x^4+11 x^3+61 x^2+15 x+66$
• $y^2=59 x^6+23 x^5+87 x^4+46 x^3+83 x^2+28 x+7$
• $y^2=70 x^6+45 x^5+11 x^4+21 x^3+49 x^2+25 x+24$
• $y^2=35 x^6+36 x^5+5 x^4+30 x^3+6 x^2+87 x+41$
• $y^2=24 x^6+58 x^5+58 x^4+66 x^3+23 x^2+26 x+63$
• $y^2=73 x^6+23 x^5+20 x^4+8 x^3+41 x^2+68 x+3$
• $y^2=14 x^6+59 x^5+10 x^4+x^3+63 x^2+16 x+63$
• $y^2=65 x^6+27 x^5+29 x^4+74 x^3+68 x^2+83 x+79$
• $y^2=66 x^6+83 x^5+41 x^4+78 x^3+77 x^2+87 x+26$
• $y^2=83 x^6+84 x^5+78 x^4+45 x^3+73 x^2+49 x+3$
• $y^2=3 x^6+x^5+34 x^4+77 x^3+71 x^2+64 x+46$
• $y^2=87 x^6+65 x^5+85 x^4+53 x^3+81 x^2+74 x+35$
• $y^2=23 x^6+25 x^5+22 x^4+25 x^3+82 x^2+37 x+19$
• $y^2=46 x^6+80 x^5+20 x^4+24 x^3+64 x^2+28 x+52$
• $y^2=25 x^6+17 x^5+77 x^4+77 x^2+72 x+25$
• $y^2=36 x^6+28 x^5+10 x^4+68 x^3+81 x^2+82 x+25$
• $y^2=3 x^6+11 x^5+88 x^4+25 x^3+87 x^2+56 x+61$
• $y^2=8 x^6+5 x^5+32 x^4+33 x^3+55 x^2+74 x+86$
• $y^2=9 x^6+83 x^5+87 x^4+12 x^3+87 x^2+83 x+9$
• $y^2=39 x^6+17 x^5+73 x^4+4 x^3+84 x^2+18 x+79$
• $y^2=51 x^6+43 x^5+18 x^4+66 x^3+84 x^2+68 x+86$
• $y^2=41 x^6+76 x^5+64 x^4+59 x^3+31 x^2+46 x+7$
• $y^2=3 x^6+81 x^5+25 x^3+81 x^2+37 x+88$
• $y^2=39 x^6+6 x^5+54 x^4+83 x^3+7 x^2+17 x+64$
• $y^2=56 x^6+64 x^5+44 x^4+84 x^3+64 x^2+6 x+35$
• $y^2=21 x^6+23 x^5+71 x^4+39 x^3+32 x^2+75 x+49$
• $y^2=72 x^6+30 x^5+54 x^4+79 x^3+54 x^2+30 x+72$
• $y^2=38 x^6+45 x^5+68 x^4+77 x^3+75 x^2+82 x+42$
• $y^2=86 x^6+49 x^5+3 x^4+47 x^3+83 x^2+25 x+19$
• $y^2=3 x^6+45 x^5+65 x^4+23 x^3+45 x^2+71 x+87$
• $y^2=7 x^6+14 x^5+54 x^4+53 x^3+76 x^2+40 x+7$
• $y^2=59 x^6+76 x^5+41 x^4+48 x^2+71 x+59$
• $y^2=76 x^6+26 x^5+72 x^4+64 x^3+78 x^2+54 x+82$
• $y^2=18 x^6+27 x^5+45 x^4+62 x^3+45 x^2+27 x+18$
• $y^2=34 x^6+x^5+74 x^4+44 x^3+80 x^2+80 x$
• $y^2=2 x^6+17 x^5+21 x^4+86 x^3+57 x^2+30 x+66$
• $y^2=67 x^5+22 x^4+68 x^3+31 x^2+14 x+45$
• $y^2=77 x^6+5 x^5+63 x^4+57 x^3+54 x^2+2 x$
• $y^2=28 x^6+80 x^5+61 x^4+62 x^3+24 x^2+17 x+75$
• $y^2=49 x^6+33 x^5+29 x^4+43 x^3+75 x^2+46 x+67$
• $y^2=43 x^6+66 x^5+10 x^4+82 x^3+70 x^2+41 x+69$
• $y^2=19 x^6+22 x^5+58 x^4+67 x^3+69 x^2+39 x+19$
• $y^2=59 x^6+17 x^5+41 x^4+82 x^3+58 x^2+84 x+43$
• $y^2=43 x^6+74 x^5+75 x^4+70 x^3+29 x^2+5 x+72$
• $y^2=34 x^6+34 x^5+65 x^4+49 x^3+16 x^2+77 x+42$
• $y^2=35 x^6+52 x^5+56 x^4+24 x^3+x^2+28 x+78$
• $y^2=3 x^6+59 x^5+55 x^4+51 x^3+55 x^2+59 x+3$
• $y^2=69 x^6+43 x^5+64 x^4+24 x^3+57 x^2+33 x+47$
• $y^2=43 x^6+76 x^5+17 x^4+26 x^3+83 x^2+79 x+25$
• $y^2=55 x^6+29 x^5+72 x^4+8 x^3+86 x^2+21 x+29$
• $y^2=34 x^6+78 x^5+75 x^4+56 x^3+58 x^2+79 x+57$
• $y^2=52 x^6+41 x^5+55 x^4+56 x^3+60 x^2+61 x+75$
• $y^2=28 x^6+42 x^5+43 x^4+51 x^3+24 x^2+72 x+33$
• $y^2=46 x^6+73 x^5+64 x^4+71 x^3+30 x^2+25 x+87$
• $y^2=15 x^6+15 x^5+23 x^4+83 x^3+67 x^2+74 x+15$
• $y^2=62 x^6+5 x^5+75 x^4+x^3+70 x^2+14 x+82$
• $y^2=72 x^6+11 x^5+x^4+14 x^3+37 x^2+86 x+51$
• $y^2=27 x^6+66 x^5+56 x^4+64 x^3+2 x^2+69 x+14$
• $y^2=30 x^6+19 x^5+25 x^4+84 x^3+13 x^2+32 x+16$
• $y^2=19 x^6+41 x^5+x^4+27 x^3+42 x^2+83 x+54$
• $y^2=54 x^6+59 x^5+75 x^4+85 x^3+33 x^2+60 x+66$
• $y^2=65 x^6+77 x^5+7 x^4+81 x^3+72 x^2+22 x+1$
• $y^2=62 x^6+25 x^5+11 x^4+72 x^3+43 x^2+40 x+46$
• $y^2=19 x^6+25 x^5+84 x^4+49 x^3+14 x^2+35 x+41$
• $y^2=66 x^6+36 x^5+4 x^3+64 x^2+8 x+88$
• $y^2=65 x^6+61 x^5+30 x^4+85 x^3+18 x^2+35 x+14$
• $y^2=17 x^6+19 x^5+19 x^4+13 x^3+61 x^2+60 x+73$
• $y^2=84 x^6+44 x^5+67 x^4+30 x^3+70 x^2+26 x+74$
• $y^2=79 x^6+58 x^5+49 x^4+5 x^3+84 x^2+64 x+64$
• $y^2=43 x^6+44 x^5+47 x^4+13 x^3+45 x^2+85 x+26$
• $y^2=55 x^6+32 x^5+2 x^4+74 x^3+5 x^2+22 x+25$
• $y^2=72 x^6+88 x^5+45 x^4+13 x^3+53 x^2+68 x+76$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{89^{4}}$.

Endomorphism algebra over $\F_{89}$

The isogeny class factors as 1.89.aq $\times$ 1.89.ak and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:

• 1.89.aq : \(\Q(\sqrt{-1}) \).
• 1.89.ak : \(\Q(\sqrt{-1}) \).

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

The base change of $A$ to $\F_{89^{4}}$ is 1.62742241.oli^2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-1}) \)$)$

Remainder of endomorphism lattice by field

• Endomorphism algebra over $\F_{89^{2}}$
  The base change of $A$ to $\F_{89^{2}}$ is 1.7921.ada $\times$ 1.7921.da. The endomorphism algebra for each factor is:

  • 1.7921.ada : \(\Q(\sqrt{-1}) \).
  • 1.7921.da : \(\Q(\sqrt{-1}) \).

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
2.89.ag_s	$2$	(not in LMFDB)
2.89.g_s	$2$	(not in LMFDB)
2.89.ba_na	$2$	(not in LMFDB)