Abelian variety isogeny class 2.41.k_dy over $\F_{41}$

• Label: 2.41.k_dy
• Base field: $\F_{41}$
• 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:	$\F_{41}$
Dimension:	$2$
L-polynomial:	$1 + 10 x + 102 x^{2} + 410 x^{3} + 1681 x^{4}$
Frobenius angles:	$\pm0.569244667553$, $\pm0.691140035741$
Angle rank:	$2$ (numerical)
Number field:	4.0.436400.1
Galois group:	$D_{4}$
Jacobians:	$54$
Isomorphism classes:	72

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$2204$	$3006256$	$4693199804$	$7985818438400$	$13425214228049404$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$52$	$1786$	$68092$	$2826078$	$115878252$	$4750016986$	$194754163012$	$7984925666238$	$327381940040452$	$13422659401235706$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 54 curves (of which all are hyperelliptic):

• $y^2=24 x^6+2 x^5+6 x^4+8 x^3+24 x^2+32 x+32$
• $y^2=x^6+32 x^5+39 x^4+4 x^3+32 x^2+40 x+37$
• $y^2=5 x^5+23 x^4+30 x^3+5 x^2+x+40$
• $y^2=22 x^6+33 x^5+22 x^4+10 x^3+40 x^2+29 x+33$
• $y^2=3 x^6+21 x^5+36 x^4+9 x^3+15 x^2+34 x+1$
• $y^2=8 x^6+11 x^5+3 x^4+3 x^3+36 x^2+4 x+16$
• $y^2=18 x^6+x^5+24 x^3+8 x^2+27 x+35$
• $y^2=40 x^6+34 x^5+35 x^4+30 x^3+15 x^2+13 x+7$
• $y^2=25 x^6+27 x^5+20 x^4+26 x^3+9 x^2+23 x+24$
• $y^2=18 x^6+22 x^5+2 x^4+35 x^3+10 x^2+29 x+40$
• $y^2=37 x^6+19 x^5+10 x^4+22 x^3+31 x^2+10 x+17$
• $y^2=25 x^6+17 x^5+30 x^4+29 x^2+14 x+25$
• $y^2=22 x^6+28 x^5+2 x^4+30 x^3+25 x^2+4 x+22$
• $y^2=21 x^6+30 x^5+8 x^4+28 x^3+30 x^2+7 x+19$
• $y^2=14 x^5+31 x^4+35 x^3+30 x^2+31$
• $y^2=23 x^6+x^5+x^4+37 x^3+26 x^2+23 x+20$
• $y^2=36 x^6+22 x^5+12 x^4+28 x^3+10 x^2+6 x+26$
• $y^2=2 x^6+32 x^5+14 x^4+37 x^3+37 x^2+39 x+24$
• $y^2=7 x^6+x^5+14 x^4+27 x^3+40 x^2+17 x+34$
• $y^2=21 x^6+22 x^5+31 x^4+33 x^3+23 x^2+22 x+32$
• and

• $y^2=20 x^6+3 x^5+34 x^4+39 x^3+39 x^2+11 x$
• $y^2=40 x^6+8 x^5+x^4+15 x^3+8 x^2+36 x+23$
• $y^2=26 x^6+28 x^5+37 x^4+17 x^3+29 x^2+35 x+30$
• $y^2=29 x^6+28 x^5+34 x^4+22 x^3+7 x^2+18 x+21$
• $y^2=37 x^6+5 x^5+13 x^4+5 x^3+16 x^2+x+36$
• $y^2=26 x^6+32 x^5+32 x^4+5 x^3+40 x^2+10 x+11$
• $y^2=36 x^6+2 x^5+21 x^4+22 x^3+26 x^2+7 x+3$
• $y^2=29 x^6+28 x^5+13 x^4+29 x^3+37 x^2+23$
• $y^2=22 x^6+8 x^5+29 x^4+4 x^3+13 x^2+19 x+10$
• $y^2=25 x^6+17 x^5+33 x^4+33 x^3+5 x^2+5 x+21$
• $y^2=33 x^6+38 x^5+6 x^4+21 x^3+40 x^2+37 x$
• $y^2=7 x^6+26 x^5+20 x^4+15 x^3+23 x^2+40 x+8$
• $y^2=22 x^6+30 x^5+32 x^4+14 x^3+36 x+30$
• $y^2=20 x^6+23 x^5+8 x^4+36 x^3+27 x^2+37 x+29$
• $y^2=x^6+24 x^5+3 x^4+39 x^3+37 x^2+30 x+1$
• $y^2=20 x^6+16 x^5+29 x^4+5 x^3+11 x^2+27 x+5$
• $y^2=22 x^6+4 x^5+24 x^4+4 x^3+3 x^2+22 x+37$
• $y^2=2 x^6+5 x^5+36 x^4+31 x^3+4 x^2+34 x+33$
• $y^2=32 x^6+22 x^5+21 x^4+6 x^3+15 x^2+20 x+23$
• $y^2=19 x^6+32 x^5+36 x^4+38 x^3+17 x^2+28 x+16$
• $y^2=16 x^6+5 x^5+10 x^4+27 x^3+17 x^2+14 x+16$
• $y^2=33 x^6+35 x^5+40 x^4+8 x^3+13 x^2+5 x+9$
• $y^2=8 x^6+6 x^5+32 x^4+34 x^3+11 x^2+2 x+6$
• $y^2=37 x^6+21 x^5+14 x^4+19 x^3+11 x+8$
• $y^2=31 x^6+32 x^5+11 x^4+35 x^3+6 x^2+38 x$
• $y^2=32 x^6+33 x^5+9 x^4+40 x^3+x^2+3 x+27$
• $y^2=11 x^6+14 x^5+x^4+33 x^3+17 x^2+15 x+32$
• $y^2=16 x^6+5 x^5+26 x^4+13 x^3+39 x^2+22 x+18$
• $y^2=20 x^6+5 x^5+9 x^4+31 x^3+30 x^2+34 x+10$
• $y^2=7 x^6+3 x^5+40 x^4+34 x^3+32 x^2+36 x+20$
• $y^2=27 x^6+15 x^5+17 x^4+6 x^3+36 x^2+12 x+27$
• $y^2=13 x^6+25 x^5+24 x^4+12 x^3+26 x^2+x+18$
• $y^2=18 x^6+39 x^5+10 x^4+13 x^3+23 x^2+30 x+22$
• $y^2=11 x^6+31 x^5+24 x^4+36 x^3+8 x^2+40 x+35$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{41}$.

Endomorphism algebra over $\F_{41}$

The endomorphism algebra of this simple isogeny class is 4.0.436400.1.

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
2.41.ak_dy	$2$	(not in LMFDB)