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

• Label: 2.97.j_gf
• Base field: $\F_{97}$
• Dimension: $2$
• $p$-rank: $2$
• Ordinary: yes
• Supersingular: no
• Simple: yes
• Geometrically simple: yes
• Primitive: yes
• Principally polarizable: yes
• Contains a Jacobian: yes

Invariants

Base field:	$\F_{97}$
Dimension:	$2$
L-polynomial:	$1 + 9 x + 161 x^{2} + 873 x^{3} + 9409 x^{4}$
Frobenius angles:	$\pm0.454643692730$, $\pm0.704401324937$
Angle rank:	$2$ (numerical)
Number field:	\(\Q(\sqrt{-1258 +18 \sqrt{213}})\)
Galois group:	$D_{4}$
Jacobians:	$118$
Cyclic group of points:	yes

This isogeny class is simple and 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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$10453$	$90826117$	$832060650181$	$7837430776510149$	$73741262382467043328$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$107$	$9651$	$911675$	$88529251$	$8587206302$	$832971820083$	$80798317135307$	$7837433447457859$	$760231056140792507$	$73742412709000251966$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 118 curves (of which all are hyperelliptic):

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

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

Decomposition and endomorphism algebra

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

Endomorphism algebra over $\F_{97}$

The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-1258 +18 \sqrt{213}})\).

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
2.97.aj_gf	$2$	(not in LMFDB)