Abelian variety isogeny class 2.53.a_dd over $\F_{53}$

• Label: 2.53.a_dd
• Base field: $\F_{53}$
• 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:	$\F_{53}$
Dimension:	$2$
L-polynomial:	$( 1 - 5 x + 53 x^{2} )( 1 + 5 x + 53 x^{2} )$
	$1 + 81 x^{2} + 2809 x^{4}$
Frobenius angles:	$\pm0.388420875603$, $\pm0.611579124397$
Angle rank:	$1$ (numerical)
Jacobians:	$52$
Isomorphism classes:	208

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$2891$	$8357881$	$22164209984$	$62244825632521$	$174887469583853411$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$54$	$2972$	$148878$	$7888596$	$418195494$	$22164058838$	$1174711139838$	$62259720194788$	$3299763591802134$	$174887468802193772$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 52 curves (of which all are hyperelliptic):

• $y^2=24 x^6+8 x^5+49 x^4+17 x^3+26 x^2+9 x+18$
• $y^2=48 x^6+16 x^5+45 x^4+34 x^3+52 x^2+18 x+36$
• $y^2=47 x^6+14 x^5+27 x^4+8 x^3+34 x^2+5 x+45$
• $y^2=41 x^6+28 x^5+x^4+16 x^3+15 x^2+10 x+37$
• $y^2=9 x^6+23 x^5+20 x^4+14 x^3+38 x^2+26 x+39$
• $y^2=18 x^6+46 x^5+40 x^4+28 x^3+23 x^2+52 x+25$
• $y^2=35 x^6+9 x^5+5 x^4+44 x^3+5 x^2+9 x+35$
• $y^2=17 x^6+18 x^5+10 x^4+35 x^3+10 x^2+18 x+17$
• $y^2=31 x^6+52 x^5+4 x^4+50 x^3+34 x^2+7 x+17$
• $y^2=38 x^6+9 x^5+38 x^4+5 x^3+32 x^2+20 x+3$
• $y^2=4 x^6+37 x^5+31 x^4+10 x^3+17 x^2+6 x+6$
• $y^2=8 x^6+21 x^5+9 x^4+20 x^3+34 x^2+12 x+12$
• $y^2=3 x^6+49 x^5+20 x^4+51 x^3+40 x^2+42 x+28$
• $y^2=6 x^6+45 x^5+40 x^4+49 x^3+27 x^2+31 x+3$
• $y^2=34 x^6+9 x^5+22 x^4+25 x^3+43 x^2+7 x+42$
• $y^2=15 x^6+18 x^5+44 x^4+50 x^3+33 x^2+14 x+31$
• $y^2=12 x^6+44 x^5+17 x^4+52 x^3+34 x^2+23 x+44$
• $y^2=24 x^6+35 x^5+34 x^4+51 x^3+15 x^2+46 x+35$
• $y^2=51 x^6+4 x^5+14 x^4+15 x^3+28 x^2+15 x+16$
• $y^2=32 x^6+3 x^5+44 x^4+5 x^3+16 x^2+42 x+25$
• and

• $y^2=11 x^6+6 x^5+35 x^4+10 x^3+32 x^2+31 x+50$
• $y^2=17 x^6+5 x^5+19 x^4+37 x^3+6 x^2+13 x+30$
• $y^2=34 x^6+10 x^5+38 x^4+21 x^3+12 x^2+26 x+7$
• $y^2=22 x^6+28 x^5+2 x^4+38 x^3+10 x^2+25 x+2$
• $y^2=44 x^6+3 x^5+4 x^4+23 x^3+20 x^2+50 x+4$
• $y^2=25 x^6+22 x^5+x^4+47 x^3+x^2+22 x+25$
• $y^2=50 x^6+44 x^5+2 x^4+41 x^3+2 x^2+44 x+50$
• $y^2=50 x^6+7 x^5+8 x^4+18 x^3+8 x^2+7 x+50$
• $y^2=47 x^6+14 x^5+16 x^4+36 x^3+16 x^2+14 x+47$
• $y^2=23 x^6+48 x^5+33 x^4+30 x^3+33 x^2+44 x+49$
• $y^2=46 x^6+43 x^5+13 x^4+7 x^3+13 x^2+35 x+45$
• $y^2=8 x^6+38 x^5+3 x^2+26 x+22$
• $y^2=16 x^6+23 x^5+6 x^2+52 x+44$
• $y^2=5 x^6+4 x^5+30 x^4+52 x^3+10 x^2+48 x+5$
• $y^2=10 x^6+8 x^5+7 x^4+51 x^3+20 x^2+43 x+10$
• $y^2=33 x^6+18 x^5+7 x^4+5 x^3+7 x^2+18 x+33$
• $y^2=13 x^6+36 x^5+14 x^4+10 x^3+14 x^2+36 x+13$
• $y^2=34 x^6+20 x^5+10 x^4+39 x^3+23 x^2+13 x+48$
• $y^2=15 x^6+40 x^5+20 x^4+25 x^3+46 x^2+26 x+43$
• $y^2=23 x^6+51 x^5+34 x^4+19 x^3+35 x^2+23 x+46$
• $y^2=46 x^6+49 x^5+15 x^4+38 x^3+17 x^2+46 x+39$
• $y^2=16 x^6+38 x^5+5 x^4+40 x^3+9 x^2+4 x+44$
• $y^2=32 x^6+23 x^5+10 x^4+27 x^3+18 x^2+8 x+35$
• $y^2=33 x^6+38 x^5+25 x^4+8 x^3+8 x+46$
• $y^2=5 x^6+26 x^5+50 x^4+6 x^3+16 x^2+26 x+17$
• $y^2=51 x^6+26 x^5+19 x^4+37 x^3+19 x^2+26 x+51$
• $y^2=49 x^6+52 x^5+38 x^4+21 x^3+38 x^2+52 x+49$
• $y^2=6 x^6+8 x^5+27 x^4+48 x^3+50 x^2+13 x+2$
• $y^2=43 x^6+31 x^5+21 x^4+41 x^3+16 x^2+22 x+41$
• $y^2=33 x^6+9 x^5+42 x^4+29 x^3+32 x^2+44 x+29$
• $y^2=21 x^6+12 x^5+44 x^4+25 x^3+7 x^2+30 x+8$
• $y^2=42 x^6+24 x^5+35 x^4+50 x^3+14 x^2+7 x+16$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{53^{2}}$.

Endomorphism algebra over $\F_{53}$

The isogeny class factors as 1.53.af $\times$ 1.53.f and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:

• 1.53.af : \(\Q(\sqrt{-187}) \).
• 1.53.f : \(\Q(\sqrt{-187}) \).

Endomorphism algebra over $\overline{\F}_{53}$

The base change of $A$ to $\F_{53^{2}}$ is 1.2809.dd^2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-187}) \)$)$

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
2.53.ak_fb	$2$	(not in LMFDB)
2.53.k_fb	$2$	(not in LMFDB)
2.53.a_add	$4$	(not in LMFDB)