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

• Label: 2.43.c_dj
• Base field: $\F_{43}$
• 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:	$\F_{43}$
Dimension:	$2$
L-polynomial:	$( 1 + x + 43 x^{2} )^{2}$
	$1 + 2 x + 87 x^{2} + 86 x^{3} + 1849 x^{4}$
Frobenius angles:	$\pm0.524294481342$, $\pm0.524294481342$
Angle rank:	$1$ (numerical)
Jacobians:	$47$

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$2025$	$3744225$	$6301184400$	$11664103325625$	$21614137955375625$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$46$	$2020$	$79252$	$3411748$	$147026506$	$6321648310$	$271817549182$	$11688189073348$	$502592668803916$	$21611482738200100$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 47 curves (of which all are hyperelliptic):

• $y^2=x^6+14 x^3+35$
• $y^2=40 x^6+35 x^5+15 x^4+28 x^3+15 x^2+35 x+40$
• $y^2=27 x^6+6 x^5+x^4+9 x^3+x^2+6 x+27$
• $y^2=12 x^6+36 x^4+17 x^3+36 x^2+12$
• $y^2=4 x^6+40 x^5+21 x^4+30 x^3+21 x^2+40 x+4$
• $y^2=10 x^6+22 x^5+3 x^4+3 x^2+22 x+10$
• $y^2=35 x^6+17 x^5+34 x^4+15 x^3+34 x^2+17 x+35$
• $y^2=7 x^6+x^5+35 x^4+31 x^3+19 x^2+28 x+6$
• $y^2=24 x^6+6 x^5+17 x^4+14 x^3+17 x^2+6 x+24$
• $y^2=x^6+24 x^5+39 x^4+36 x^3+39 x^2+24 x+1$
• $y^2=30 x^6+5 x^5+10 x^4+5 x^3+11 x^2+19 x+4$
• $y^2=14 x^6+9 x^5+29 x^4+42 x^3+4 x^2+39 x+17$
• $y^2=30 x^6+27 x^5+20 x^4+23 x^3+20 x^2+27 x+30$
• $y^2=40 x^6+6 x^5+2 x^4+17 x^3+19 x^2+26 x+2$
• $y^2=2 x^6+32 x^4+31 x^3+32 x^2+2$
• $y^2=30 x^6+x^5+9 x^4+3 x^3+9 x^2+x+30$
• $y^2=39 x^6+41 x^5+33 x^4+22 x^3+33 x^2+41 x+39$
• $y^2=18 x^6+17 x^5+26 x^4+x^3+26 x^2+17 x+18$
• $y^2=42 x^6+40 x^4+34 x^3+40 x^2+42$
• $y^2=37 x^6+36 x^5+7 x^4+34 x^3+30 x^2+41 x+27$
• and

• $y^2=31 x^6+23 x^5+28 x^4+4 x^3+28 x^2+23 x+31$
• $y^2=42 x^6+18 x^5+39 x^4+14 x^3+39 x^2+18 x+42$
• $y^2=30 x^6+25 x^5+35 x^4+24 x^3+35 x^2+25 x+30$
• $y^2=25 x^6+12 x^5+42 x^4+37 x^3+42 x^2+12 x+25$
• $y^2=21 x^6+8 x^5+39 x^4+25 x^3+39 x^2+8 x+21$
• $y^2=25 x^6+29 x^5+8 x^4+9 x^3+8 x^2+29 x+25$
• $y^2=11 x^6+25 x^4+30 x^3+13 x^2+10 x+41$
• $y^2=42 x^6+16 x^5+27 x^4+39 x^3+27 x^2+16 x+42$
• $y^2=9 x^6+18 x^5+34 x^4+28 x^3+34 x^2+18 x+9$
• $y^2=x^6+40 x^3+16$
• $y^2=13 x^6+38 x^5+12 x^4+34 x^3+9 x^2+34 x+18$
• $y^2=35 x^6+32 x^5+16 x^4+34 x^3+16 x^2+32 x+35$
• $y^2=12 x^6+29 x^5+30 x^4+9 x^3+30 x^2+29 x+12$
• $y^2=x^6+x^3+1$
• $y^2=42 x^6+24 x^5+13 x^4+21 x^3+13 x^2+24 x+42$
• $y^2=x^6+10 x^3+11$
• $y^2=9 x^6+10 x^5+15 x^4+10 x^3+13 x^2+29 x+37$
• $y^2=21 x^6+15 x^5+24 x^4+29 x^3+24 x^2+15 x+21$
• $y^2=26 x^6+27 x^5+22 x^4+22 x^2+27 x+26$
• $y^2=41 x^6+41 x^5+30 x^4+38 x^3+24 x^2+x+19$
• $y^2=2 x^6+26 x^5+19 x^4+19 x^3+19 x^2+26 x+2$
• $y^2=13 x^6+10 x^5+42 x^4+15 x^3+42 x^2+10 x+13$
• $y^2=21 x^6+23 x^5+40 x^4+31 x^3+25 x^2+30 x+8$
• $y^2=13 x^6+7 x^5+18 x^4+12 x^3+18 x^2+7 x+13$
• $y^2=28 x^6+27 x^5+4 x^4+11 x^3+28 x^2+x+23$
• $y^2=15 x^6+8 x^5+16 x^4+24 x^3+39 x^2+26 x+4$
• $y^2=20 x^6+4 x^5+23 x^4+4 x^3+23 x^2+4 x+20$

Decomposition and endomorphism algebra

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

Endomorphism algebra over $\F_{43}$

The isogeny class factors as 1.43.b^2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-19}) \)$)$

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
2.43.ac_dj	$2$	(not in LMFDB)
2.43.a_dh	$2$	(not in LMFDB)
2.43.ab_abq	$3$	(not in LMFDB)