Abelian variety isogeny class 2.97.ac_hn over $\F_{97}$

• Label: 2.97.ac_hn
• Base field: $\F_{97}$
• 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:	$\F_{97}$
Dimension:	$2$
L-polynomial:	$( 1 - x + 97 x^{2} )^{2}$
	$1 - 2 x + 195 x^{2} - 194 x^{3} + 9409 x^{4}$
Frobenius angles:	$\pm0.483833314357$, $\pm0.483833314357$
Angle rank:	$1$ (numerical)
Jacobians:	$92$
Cyclic group of points:	no
Non-cyclic primes:	$97$

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$9409$	$92217609$	$833503265296$	$7834170744744201$	$73741613038535927809$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$96$	$9796$	$913254$	$88492420$	$8587247136$	$832975487422$	$80798296993440$	$7837433269090564$	$760231057115292198$	$73742412719506333636$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 92 curves (of which all are hyperelliptic):

• $y^2=6 x^6+6 x^5+90 x^4+90 x^3+61 x^2+9 x+47$
• $y^2=85 x^6+10 x^5+78 x^4+90 x^3+69 x^2+15 x+96$
• $y^2=61 x^6+46 x^5+11 x^4+7 x^3+60 x^2+34 x+68$
• $y^2=73 x^6+2 x^5+43 x^4+62 x^3+96 x^2+41 x+10$
• $y^2=5 x^6+19 x^3+92$
• $y^2=84 x^6+46 x^5+22 x^4+53 x^3+47 x^2+42 x+68$
• $y^2=7 x^6+x^5+88 x^4+74 x^3+86 x^2+47 x+68$
• $y^2=43 x^6+12 x^5+45 x^4+15 x^3+60 x^2+68 x+56$
• $y^2=53 x^6+68 x^4+44 x^3+28 x^2+59 x+53$
• $y^2=19 x^6+65 x^5+13 x^4+11 x^3+32 x^2+5 x+85$
• $y^2=47 x^6+81 x^5+54 x^4+74 x^3+20 x^2+64 x+65$
• $y^2=71 x^6+56 x^5+17 x^4+24 x^3+58 x^2+92 x+23$
• $y^2=91 x^6+41 x^5+92 x^4+43 x^3+6 x^2+49 x+47$
• $y^2=86 x^6+84 x^5+15 x^4+58 x^3+94 x^2+90 x+9$
• $y^2=25 x^6+18 x^5+84 x^4+42 x^3+57 x^2+12 x+9$
• $y^2=15 x^6+96 x^5+60 x^4+67 x^3+61 x^2+67 x+18$
• $y^2=73 x^6+80 x^5+37 x^4+61 x^3+37 x^2+45 x+62$
• $y^2=92 x^6+30 x^5+89 x^4+92 x^3+62 x^2+44 x+81$
• $y^2=92 x^6+87 x^5+38 x^4+51 x^3+48 x^2+38 x+4$
• $y^2=87 x^6+9 x^5+48 x^4+25 x^3+16 x^2+x+14$
• and

• $y^2=21 x^6+37 x^5+46 x^4+3 x^3+14 x^2+39 x+26$
• $y^2=15 x^6+78 x^5+75 x^4+75 x^3+60 x^2+53 x+93$
• $y^2=81 x^6+71 x^5+90 x^4+87 x^3+60 x^2+10 x+24$
• $y^2=30 x^6+72 x^5+75 x^4+7 x^3+92 x^2+83 x+75$
• $y^2=13 x^6+30 x^5+5 x^4+56 x^3+65 x^2+37 x+56$
• $y^2=30 x^6+16 x^5+4 x^4+19 x^3+71 x^2+70 x+65$
• $y^2=84 x^6+x^5+46 x^4+17 x^3+28 x^2+42 x+54$
• $y^2=7 x^6+29 x^5+17 x^4+18 x^3+87 x^2+48 x+68$
• $y^2=75 x^6+72 x^5+88 x^4+48 x^3+4 x^2+25 x+1$
• $y^2=26 x^6+60 x^5+12 x^4+65 x^3+22 x^2+40 x+21$
• $y^2=20 x^6+47 x^5+64 x^4+33 x^3+78 x^2+93 x+93$
• $y^2=82 x^6+43 x^5+38 x^4+2 x^3+59 x^2+14 x+86$
• $y^2=37 x^6+87 x^5+8 x^4+75 x^3+47 x^2+58 x+56$
• $y^2=26 x^6+80 x^5+34 x^4+3 x^3+4 x^2+94 x+69$
• $y^2=75 x^6+24 x^4+67 x^3+24 x^2+75$
• $y^2=13 x^6+29 x^5+38 x^4+26 x^3+38 x^2+29 x+13$
• $y^2=2 x^6+23 x^5+93 x^4+16 x^3+50 x^2+29 x+95$
• $y^2=91 x^6+88 x^5+26 x^4+28 x^3+64 x^2+74 x+30$
• $y^2=21 x^6+77 x^5+27 x^4+45 x^3+91 x^2+5 x+82$
• $y^2=30 x^6+46 x^5+79 x^4+42 x^3+23 x^2+49 x+60$
• $y^2=19 x^6+28 x^5+26 x^4+38 x^3+26 x^2+42 x+93$
• $y^2=82 x^6+37 x^5+21 x^4+10 x^3+67 x^2+28 x+87$
• $y^2=16 x^6+20 x^5+28 x^4+57 x^3+68 x^2+17 x+94$
• $y^2=49 x^6+58 x^5+50 x^4+22 x^3+57 x^2+88 x+22$
• $y^2=93 x^6+59 x^5+96 x^4+18 x^3+95 x^2+79 x+62$
• $y^2=78 x^6+40 x^5+12 x^4+44 x^3+5 x^2+30 x+39$
• $y^2=72 x^6+47 x^5+90 x^4+59 x^3+92 x^2+28 x+30$
• $y^2=72 x^6+8 x^5+29 x^4+33 x^3+40 x^2+85 x+35$
• $y^2=92 x^6+66 x^5+59 x^4+16 x^3+28 x^2+69 x+91$
• $y^2=22 x^6+45 x^5+57 x^4+49 x^3+12 x^2+72 x+6$
• $y^2=88 x^6+58 x^5+15 x^4+71 x^3+22 x^2+25 x+47$
• $y^2=4 x^6+63 x^4+7 x^3+48 x^2+51 x+63$
• $y^2=66 x^6+62 x^5+36 x^4+24 x^3+51 x^2+9 x+84$
• $y^2=5 x^6+79 x^5+10 x^4+83 x^3+10 x^2+6 x+26$
• $y^2=55 x^6+9 x^5+29 x^4+76 x^3+36 x^2+68 x+7$
• $y^2=x^6+58 x^5+36 x^4+26 x^3+66 x^2+71 x+12$
• $y^2=5 x^6+5 x^3+84$
• $y^2=52 x^6+38 x^5+44 x^4+16 x^3+71 x^2+87 x+49$
• $y^2=79 x^6+58 x^5+82 x^4+91 x^3+57 x^2+24 x+79$
• $y^2=46 x^6+36 x^5+78 x^4+62 x^3+77 x^2+94 x+83$
• $y^2=52 x^6+45 x^5+5 x^4+55 x^3+77 x^2+14$
• $y^2=4 x^6+32 x^5+8 x^4+62 x^3+43 x^2+32 x+15$
• $y^2=58 x^6+73 x^5+44 x^4+23 x^3+96 x^2+6 x+83$
• $y^2=50 x^6+4 x^5+84 x^4+18 x^3+55 x^2+60 x+37$
• $y^2=61 x^6+22 x^5+80 x^4+64 x^3+60 x^2+73 x+3$
• $y^2=89 x^6+30 x^5+17 x^4+74 x^3+73 x^2+40 x+1$
• $y^2=45 x^6+4 x^5+18 x^4+11 x^3+11 x^2+17 x+11$
• $y^2=53 x^6+48 x^5+34 x^4+61 x^3+5 x^2+45 x+29$
• $y^2=75 x^6+8 x^5+35 x^4+13 x^3+86 x^2+91 x+88$
• $y^2=55 x^6+59 x^5+72 x^4+29 x^3+x^2+51 x+78$
• $y^2=6 x^6+74 x^5+50 x^4+53 x^3+21 x^2+8 x+29$
• $y^2=6 x^6+75 x^5+49 x^4+79 x^3+27 x^2+83 x+80$
• $y^2=57 x^6+90 x^5+7 x^4+86 x^3+60 x^2+40 x+37$
• $y^2=27 x^6+10 x^5+18 x^4+29 x^3+33 x^2+39 x+36$
• $y^2=32 x^6+4 x^5+79 x^4+63 x^3+27 x^2+9 x+86$
• $y^2=79 x^6+67 x^5+52 x^4+52 x^3+76 x^2+84 x+8$
• $y^2=70 x^6+28 x^5+27 x^4+76 x^3+24 x^2+82 x+96$
• $y^2=66 x^6+40 x^5+42 x^4+21 x^3+69 x^2+9 x+14$
• $y^2=76 x^6+68 x^5+85 x^4+87 x^3+96 x^2+77 x+77$
• $y^2=54 x^6+23 x^5+77 x^4+34 x^3+11 x^2+82 x+89$
• $y^2=4 x^6+28 x^5+92 x^4+82 x^3+25 x^2+10 x+53$
• $y^2=44 x^6+61 x^5+87 x^4+24 x^3+58 x^2+81 x+31$
• $y^2=90 x^6+9 x^5+56 x^4+63 x^3+68 x^2+88 x+57$
• $y^2=58 x^6+32 x^5+86 x^4+19 x^3+91 x^2+48 x+21$
• $y^2=5 x^6+5 x^3+60$
• $y^2=94 x^6+46 x^5+66 x^4+13 x^3+86 x^2+39 x+31$
• $y^2=15 x^6+31 x^5+34 x^4+94 x^3+2 x^2+85 x+46$
• $y^2=27 x^6+2 x^5+82 x^4+42 x^3+32 x^2+21 x+33$
• $y^2=56 x^6+10 x^5+27 x^4+66 x^3+24 x^2+87 x+29$
• $y^2=5 x^6+5 x^3+37$
• $y^2=14 x^6+43 x^5+67 x^4+95 x^3+28 x^2+81 x+39$
• $y^2=92 x^6+91 x^5+60 x^4+11 x^3+23 x^2+73 x+62$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{97}$.

Endomorphism algebra over $\F_{97}$

The isogeny class factors as 1.97.ab^2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-43}) \)$)$

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
2.97.a_hl	$2$	(not in LMFDB)
2.97.c_hn	$2$	(not in LMFDB)
2.97.b_ads	$3$	(not in LMFDB)