Abelian variety isogeny class 2.43.b_aba over $\F_{43}$

• Label: 2.43.b_aba
• Base field: $\F_{43}$
• 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:	$\F_{43}$
Dimension:	$2$
L-polynomial:	$1 + x - 26 x^{2} + 43 x^{3} + 1849 x^{4}$
Frobenius angles:	$\pm0.220394801312$, $\pm0.820978645846$
Angle rank:	$2$ (numerical)
Number field:	4.0.172772057.1
Galois group:	$D_{4}$
Jacobians:	$44$
Isomorphism classes:	44

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$1868$	$3325040$	$6338041808$	$11707931345600$	$21611492516814948$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$45$	$1797$	$79716$	$3424569$	$147008515$	$6321601974$	$271817741457$	$11688196693041$	$502592582505468$	$21611481845141557$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 44 curves (of which all are hyperelliptic):

• $y^2=17 x^6+19 x^5+37 x^4+39 x^3+35 x^2+39 x+20$
• $y^2=13 x^6+6 x^5+5 x^4+27 x^3+21 x^2+16 x+20$
• $y^2=13 x^6+26 x^5+23 x^4+9 x^3+28 x^2+28 x+4$
• $y^2=27 x^6+18 x^5+7 x^4+35 x^3+19 x^2+3 x+17$
• $y^2=21 x^6+18 x^5+11 x^4+18 x^3+2 x^2+9 x$
• $y^2=38 x^6+9 x^5+33 x^3+26 x^2+5 x+5$
• $y^2=7 x^6+39 x^5+40 x^4+5 x^3+20 x^2+37 x$
• $y^2=41 x^6+35 x^5+12 x^4+23 x^3+33 x^2+40 x+8$
• $y^2=40 x^6+42 x^5+7 x^4+40 x^3+37 x^2+29 x+38$
• $y^2=40 x^6+6 x^5+42 x^4+16 x^3+31 x^2+8$
• $y^2=11 x^6+5 x^5+8 x^4+30 x^3+8 x^2+30 x+7$
• $y^2=40 x^6+37 x^5+27 x^4+30 x^3+6 x^2+39 x+23$
• $y^2=36 x^6+13 x^5+6 x^4+15 x^3+31 x^2+39 x+8$
• $y^2=25 x^6+40 x^5+11 x^4+13 x^3+16 x$
• $y^2=19 x^6+8 x^5+38 x^4+23 x^3+38 x^2+27 x$
• $y^2=35 x^5+30 x^4+24 x^3+4 x^2+29 x$
• $y^2=30 x^6+31 x^5+11 x^4+10 x^3+15 x^2+8 x+21$
• $y^2=19 x^6+6 x^5+36 x^4+13 x^3+40 x^2+14 x+3$
• $y^2=18 x^6+13 x^5+23 x^4+12 x^3+14 x^2+40 x+5$
• $y^2=4 x^6+17 x^5+40 x^4+26 x^3+17 x^2+7 x+10$
• and

• $y^2=27 x^6+15 x^5+34 x^4+19 x^3+20 x^2+33 x+21$
• $y^2=37 x^5+4 x^4+41 x^3+38 x^2+16 x+35$
• $y^2=14 x^6+38 x^5+6 x^4+7 x^3+42 x+17$
• $y^2=19 x^6+20 x^4+13 x^3+27 x^2+9 x+34$
• $y^2=10 x^6+5 x^5+27 x^4+40 x^3+4 x^2+28 x+20$
• $y^2=41 x^6+15 x^5+30 x^4+31 x^3+12 x^2+15 x+8$
• $y^2=5 x^6+24 x^5+21 x^4+41 x^3+24 x^2+17 x+41$
• $y^2=21 x^6+29 x^5+x^4+35 x^3+13 x^2+10 x$
• $y^2=20 x^6+34 x^5+24 x^4+8 x^3+25 x^2+42 x+24$
• $y^2=22 x^6+30 x^5+31 x^4+10 x^3+33 x^2+28 x+5$
• $y^2=30 x^6+29 x^5+40 x^4+40 x^3+4 x^2+15 x+17$
• $y^2=x^6+29 x^5+39 x^4+18 x^3+42 x^2+42 x$
• $y^2=21 x^6+41 x^5+27 x^4+38 x^3+8 x^2+2 x+35$
• $y^2=41 x^5+21 x^4+30 x^3+33 x^2+13 x+34$
• $y^2=36 x^6+2 x^5+18 x^4+16 x^3+34 x^2+22 x+35$
• $y^2=11 x^6+19 x^5+4 x^4+36 x^3+7 x^2+3 x+16$
• $y^2=26 x^6+15 x^5+7 x^4+36 x^3+20 x^2+11 x+42$
• $y^2=40 x^6+18 x^5+19 x^4+28 x^3+34 x+17$
• $y^2=39 x^6+4 x^5+34 x^4+20 x^3+33 x^2+4 x+8$
• $y^2=7 x^6+34 x^5+22 x^4+24 x^3+17 x^2+38 x$
• $y^2=35 x^6+42 x^5+20 x^4+8 x^3+20 x^2+18 x+3$
• $y^2=10 x^6+21 x^5+38 x^4+21 x^3+20 x^2+36 x+33$
• $y^2=27 x^6+24 x^5+7 x^4+10 x^3+35 x^2+24 x+5$
• $y^2=39 x^6+33 x^5+28 x^4+4 x^3+15 x^2+19 x+29$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{43}$.

Endomorphism algebra over $\F_{43}$

The endomorphism algebra of this simple isogeny class is 4.0.172772057.1.

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
2.43.ab_aba	$2$	(not in LMFDB)