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

• Label: 2.97.c_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:	$\pm0.516166685643$, $\pm0.516166685643$
Angle rank:	$1$ (numerical)
Jacobians:	$92$
Cyclic group of points:	no
Non-cyclic primes:	$3, 11$

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$9801$	$92217609$	$832444563456$	$7834170744744201$	$73743212379134938761$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$100$	$9796$	$912094$	$88492420$	$8587433380$	$832975487422$	$80798271962788$	$7837433269090564$	$760231060193838238$	$73742412719506333636$

Jacobians and polarizations

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

• $y^2=40 x^6+40 x^5+18 x^4+18 x^3+51 x^2+60 x+87$
• $y^2=17 x^6+2 x^5+35 x^4+18 x^3+72 x^2+3 x+58$
• $y^2=51 x^6+48 x^5+41 x^4+79 x^3+12 x^2+65 x+33$
• $y^2=74 x^6+10 x^5+21 x^4+19 x^3+92 x^2+11 x+50$
• $y^2=x^6+62 x^3+96$
• $y^2=75 x^6+48 x^5+82 x^4+30 x^3+87 x^2+86 x+33$
• $y^2=79 x^6+39 x^5+37 x^4+73 x^3+56 x^2+87 x+33$
• $y^2=28 x^6+80 x^5+9 x^4+3 x^3+12 x^2+33 x+50$
• $y^2=30 x^6+33 x^4+67 x^3+25 x^2+70 x+30$
• $y^2=62 x^6+13 x^5+22 x^4+41 x^3+84 x^2+x+17$
• $y^2=41 x^6+17 x^5+76 x^4+79 x^3+3 x^2+29 x+34$
• $y^2=53 x^6+50 x^5+81 x^4+63 x^3+31 x^2+96 x+24$
• $y^2=57 x^6+47 x^5+96 x^4+28 x^3+40 x^2+68 x+87$
• $y^2=42 x^6+32 x^5+75 x^4+96 x^3+82 x^2+62 x+45$
• $y^2=5 x^6+23 x^5+75 x^4+86 x^3+89 x^2+80 x+60$
• $y^2=75 x^6+92 x^5+9 x^4+44 x^3+14 x^2+44 x+90$
• $y^2=74 x^6+12 x^5+88 x^4+14 x^3+88 x^2+31 x+19$
• $y^2=96 x^6+6 x^5+76 x^4+96 x^3+90 x^2+67 x+55$
• $y^2=72 x^6+47 x^5+93 x^4+61 x^3+46 x^2+93 x+20$
• $y^2=95 x^6+60 x^5+29 x^4+5 x^3+42 x^2+39 x+61$
• and

• $y^2=8 x^6+88 x^5+36 x^4+15 x^3+70 x^2+x+33$
• $y^2=75 x^6+2 x^5+84 x^4+84 x^3+9 x^2+71 x+77$
• $y^2=55 x^6+53 x^5+18 x^4+95 x^3+12 x^2+2 x+63$
• $y^2=6 x^6+92 x^5+15 x^4+79 x^3+96 x^2+36 x+15$
• $y^2=65 x^6+53 x^5+25 x^4+86 x^3+34 x^2+88 x+86$
• $y^2=6 x^6+42 x^5+59 x^4+62 x^3+53 x^2+14 x+13$
• $y^2=32 x^6+5 x^5+36 x^4+85 x^3+43 x^2+16 x+76$
• $y^2=35 x^6+48 x^5+85 x^4+90 x^3+47 x^2+46 x+49$
• $y^2=15 x^6+92 x^5+37 x^4+29 x^3+59 x^2+5 x+39$
• $y^2=33 x^6+9 x^5+60 x^4+34 x^3+13 x^2+6 x+8$
• $y^2=3 x^6+41 x^5+29 x^4+68 x^3+2 x^2+77 x+77$
• $y^2=94 x^6+28 x^5+27 x^4+78 x^3+70 x^2+61 x+56$
• $y^2=88 x^6+47 x^5+40 x^4+84 x^3+41 x^2+96 x+86$
• $y^2=33 x^6+12 x^5+73 x^4+15 x^3+20 x^2+82 x+54$
• $y^2=15 x^6+63 x^4+91 x^3+63 x^2+15$
• $y^2=65 x^6+48 x^5+93 x^4+33 x^3+93 x^2+48 x+65$
• $y^2=78 x^6+24 x^5+38 x^4+42 x^3+10 x^2+64 x+19$
• $y^2=57 x^6+37 x^5+44 x^4+25 x^3+71 x^2+73 x+6$
• $y^2=43 x^6+93 x^5+83 x^4+9 x^3+57 x^2+x+94$
• $y^2=6 x^6+48 x^5+74 x^4+86 x^3+24 x^2+68 x+12$
• $y^2=62 x^6+25 x^5+44 x^4+27 x^3+44 x^2+86 x+38$
• $y^2=22 x^6+88 x^5+8 x^4+50 x^3+44 x^2+43 x+47$
• $y^2=80 x^6+3 x^5+43 x^4+91 x^3+49 x^2+85 x+82$
• $y^2=51 x^6+96 x^5+56 x^4+13 x^3+91 x^2+52 x+13$
• $y^2=38 x^6+70 x^5+58 x^4+23 x^3+19 x^2+74 x+90$
• $y^2=2 x^6+6 x^5+60 x^4+26 x^3+25 x^2+53 x+1$
• $y^2=69 x^6+41 x^5+62 x^4+4 x^3+72 x^2+43 x+53$
• $y^2=69 x^6+40 x^5+48 x^4+68 x^3+6 x^2+37 x+78$
• $y^2=96 x^6+52 x^5+70 x^4+42 x^3+25 x^2+72 x+57$
• $y^2=13 x^6+31 x^5+91 x^4+51 x^3+60 x^2+69 x+30$
• $y^2=52 x^6+96 x^5+75 x^4+64 x^3+13 x^2+28 x+41$
• $y^2=20 x^6+24 x^4+35 x^3+46 x^2+61 x+24$
• $y^2=52 x^6+90 x^5+46 x^4+63 x^3+49 x^2+60 x+75$
• $y^2=25 x^6+7 x^5+50 x^4+27 x^3+50 x^2+30 x+33$
• $y^2=81 x^6+45 x^5+48 x^4+89 x^3+83 x^2+49 x+35$
• $y^2=39 x^6+31 x^5+46 x^4+44 x^3+52 x^2+53 x+80$
• $y^2=x^6+x^3+75$
• $y^2=66 x^6+93 x^5+26 x^4+80 x^3+64 x^2+47 x+51$
• $y^2=74 x^6+31 x^5+94 x^4+57 x^3+89 x^2+63 x+74$
• $y^2=36 x^6+83 x^5+2 x^4+19 x^3+94 x^2+82 x+27$
• $y^2=88 x^6+9 x^5+x^4+11 x^3+93 x^2+61$
• $y^2=20 x^6+63 x^5+40 x^4+19 x^3+21 x^2+63 x+75$
• $y^2=31 x^6+34 x^5+67 x^4+24 x^3+58 x^2+40 x+36$
• $y^2=10 x^6+59 x^5+75 x^4+23 x^3+11 x^2+12 x+85$
• $y^2=14 x^6+13 x^5+12 x^4+29 x^3+9 x^2+74 x+15$
• $y^2=76 x^6+6 x^5+81 x^4+73 x^3+34 x^2+8 x+39$
• $y^2=9 x^6+59 x^5+23 x^4+41 x^3+41 x^2+81 x+41$
• $y^2=71 x^6+46 x^5+73 x^4+14 x^3+25 x^2+31 x+48$
• $y^2=84 x^6+40 x^5+78 x^4+65 x^3+42 x^2+67 x+52$
• $y^2=81 x^6+4 x^5+69 x^4+48 x^3+5 x^2+61 x+2$
• $y^2=30 x^6+79 x^5+56 x^4+71 x^3+8 x^2+40 x+48$
• $y^2=30 x^6+84 x^5+51 x^4+7 x^3+38 x^2+27 x+12$
• $y^2=89 x^6+18 x^5+79 x^4+56 x^3+12 x^2+8 x+85$
• $y^2=38 x^6+50 x^5+90 x^4+48 x^3+68 x^2+x+83$
• $y^2=84 x^6+59 x^5+74 x^4+32 x^3+83 x^2+60 x+56$
• $y^2=74 x^6+91 x^5+88 x^4+88 x^3+54 x^2+75 x+21$
• $y^2=59 x^6+43 x^5+38 x^4+89 x^3+23 x^2+22 x+92$
• $y^2=52 x^6+8 x^5+86 x^4+43 x^3+72 x^2+60 x+61$
• $y^2=54 x^6+33 x^5+17 x^4+95 x^3+58 x^2+93 x+93$
• $y^2=76 x^6+18 x^5+94 x^4+73 x^3+55 x^2+22 x+57$
• $y^2=20 x^6+43 x^5+72 x^4+22 x^3+28 x^2+50 x+71$
• $y^2=67 x^6+51 x^5+95 x^4+63 x^3+31 x^2+55 x+45$
• $y^2=18 x^6+60 x^5+50 x^4+32 x^3+33 x^2+37 x+89$
• $y^2=96 x^6+63 x^5+42 x^4+95 x^3+67 x^2+46 x+8$
• $y^2=x^6+x^3+12$
• $y^2=77 x^6+48 x^5+52 x^4+22 x^3+56 x^2+66 x+45$
• $y^2=3 x^6+45 x^5+65 x^4+77 x^3+78 x^2+17 x+48$
• $y^2=83 x^6+78 x^5+94 x^4+86 x^3+84 x^2+43 x+26$
• $y^2=86 x^6+50 x^5+38 x^4+39 x^3+23 x^2+47 x+48$
• $y^2=x^6+x^3+85$
• $y^2=70 x^6+21 x^5+44 x^4+87 x^3+43 x^2+17 x+1$
• $y^2=72 x^6+67 x^5+9 x^4+55 x^3+18 x^2+74 x+19$

Decomposition and endomorphism algebra

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

Endomorphism algebra over $\F_{97}$

The isogeny class factors as 1.97.b^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.ac_hn	$2$	(not in LMFDB)
2.97.a_hl	$2$	(not in LMFDB)
2.97.ab_ads	$3$	(not in LMFDB)