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

• Label: 2.97.ba_na
• 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:	$( 1 + 8 x + 97 x^{2} )( 1 + 18 x + 97 x^{2} )$
	$1 + 26 x + 338 x^{2} + 2522 x^{3} + 9409 x^{4}$
Frobenius angles:	$\pm0.633124938748$, $\pm0.866875061252$
Angle rank:	$1$ (numerical)
Jacobians:	$162$
Cyclic group of points:	no
Non-cyclic primes:	$2$

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$12296$	$88531200$	$831857463944$	$7837773373440000$	$73743002350156491656$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$124$	$9410$	$911452$	$88533118$	$8587408924$	$832972004930$	$80798263092412$	$7837433941136638$	$760231056221102524$	$73742412689492826050$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 162 curves (of which all are hyperelliptic):

• $y^2=12 x^6+15 x^5+50 x^4+30 x^3+80 x^2+54 x+65$
• $y^2=50 x^6+36 x^5+57 x^4+73 x^3+61 x^2+82 x+2$
• $y^2=82 x^5+26 x^4+88 x^3+2 x^2+22 x+69$
• $y^2=12 x^6+69 x^5+76 x^4+36 x^3+76 x^2+69 x+12$
• $y^2=55 x^6+89 x^5+40 x^4+23 x^3+57 x^2+88 x+47$
• $y^2=52 x^6+27 x^5+93 x^4+12 x^3+35 x^2+21 x+29$
• $y^2=70 x^6+40 x^5+4 x^4+19 x^3+59 x^2+41 x+32$
• $y^2=40 x^6+2 x^5+55 x^4+7 x^3+22 x^2+62 x+18$
• $y^2=74 x^6+93 x^5+54 x^4+67 x^3+14 x^2+2 x+9$
• $y^2=36 x^6+19 x^5+21 x^4+9 x^3+21 x^2+19 x+36$
• $y^2=73 x^6+29 x^5+45 x^4+18 x^3+6 x^2+67 x+54$
• $y^2=28 x^6+41 x^5+36 x^4+64 x^3+35 x^2+77 x+69$
• $y^2=48 x^6+37 x^5+42 x^4+95 x^3+73 x^2+35 x+93$
• $y^2=80 x^6+60 x^5+4 x^4+14 x^3+94 x^2+90 x+22$
• $y^2=77 x^6+59 x^5+51 x^4+25 x^3+59 x^2+43 x+58$
• $y^2=32 x^6+82 x^5+82 x^4+13 x^3+94 x^2+77 x+57$
• $y^2=94 x^6+83 x^5+81 x^4+17 x^3+45 x^2+9 x+95$
• $y^2=57 x^6+45 x^5+25 x^4+53 x^3+94 x^2+13 x+9$
• $y^2=23 x^6+18 x^5+3 x^4+40 x^3+47 x^2+x+29$
• $y^2=17 x^6+35 x^5+38 x^4+94 x^3+33 x^2+18 x+43$
• and

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

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{97^{4}}$.

Endomorphism algebra over $\F_{97}$

The isogeny class factors as 1.97.i $\times$ 1.97.s and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:

• 1.97.i : \(\Q(\sqrt{-1}) \).
• 1.97.s : \(\Q(\sqrt{-1}) \).

Endomorphism algebra over $\overline{\F}_{97}$

The base change of $A$ to $\F_{97^{4}}$ is 1.88529281.cvu^2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-1}) \)$)$

Remainder of endomorphism lattice by field

• Endomorphism algebra over $\F_{97^{2}}$
  The base change of $A$ to $\F_{97^{2}}$ is 1.9409.afa $\times$ 1.9409.fa. The endomorphism algebra for each factor is:

  • 1.9409.afa : \(\Q(\sqrt{-1}) \).
  • 1.9409.fa : \(\Q(\sqrt{-1}) \).

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
2.97.aba_na	$2$	(not in LMFDB)
2.97.ak_by	$2$	(not in LMFDB)
2.97.k_by	$2$	(not in LMFDB)