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

• Label: 2.53.a_bq
• 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:	$( 1 - 8 x + 53 x^{2} )( 1 + 8 x + 53 x^{2} )$
	$1 + 42 x^{2} + 2809 x^{4}$
Frobenius angles:	$\pm0.314840234458$, $\pm0.685159765542$
Angle rank:	$1$ (numerical)
Jacobians:	$48$

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$2852$	$8133904$	$22164081284$	$62320540880896$	$174887471112639332$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$54$	$2894$	$148878$	$7898190$	$418195494$	$22163801438$	$1174711139838$	$62259692266654$	$3299763591802134$	$174887471859765614$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 48 curves (of which all are hyperelliptic):

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

• $y^2=24 x^6+51 x^5+47 x^4+25 x^3+37 x^2+21 x+5$
• $y^2=48 x^6+49 x^5+41 x^4+50 x^3+21 x^2+42 x+10$
• $y^2=19 x^6+11 x^5+17 x^4+37 x^3+26 x^2+36 x+37$
• $y^2=40 x^6+9 x^5+15 x^4+26 x^3+38 x^2+20 x+13$
• $y^2=50 x^6+8 x^5+20 x^4+44 x^3+30 x^2+47 x+10$
• $y^2=47 x^6+16 x^5+40 x^4+35 x^3+7 x^2+41 x+20$
• $y^2=18 x^6+26 x^5+44 x^4+49 x^3+17 x^2+45 x+39$
• $y^2=36 x^6+52 x^5+35 x^4+45 x^3+34 x^2+37 x+25$
• $y^2=29 x^6+51 x^5+22 x^4+7 x^3+46 x^2+39 x+39$
• $y^2=37 x^6+8 x^5+15 x^4+4 x^3+6 x^2+44 x+23$
• $y^2=16 x^6+6 x^5+25 x^4+17 x^3+27 x^2+36 x+21$
• $y^2=28 x^6+14 x^5+49 x^4+49 x^3+24 x^2+46 x+14$
• $y^2=29 x^6+13 x^5+36 x^4+x^3+31 x^2+49 x+11$
• $y^2=5 x^6+26 x^5+19 x^4+2 x^3+9 x^2+45 x+22$
• $y^2=45 x^6+32 x^5+43 x^4+40 x^3+19 x^2+18 x+43$
• $y^2=5 x^5+6 x^4+9 x^3+2 x^2+46 x+38$
• $y^2=16 x^6+18 x^5+9 x^4+42 x^3+25 x^2+5 x+13$
• $y^2=46 x^6+45 x^5+37 x^4+4 x^3+45 x^2+19 x+52$
• $y^2=39 x^6+37 x^5+21 x^4+8 x^3+37 x^2+38 x+51$
• $y^2=4 x^6+42 x^5+24 x^4+45 x^3+26 x^2+25 x+3$
• $y^2=36 x^6+38 x^5+46 x^4+44 x^3+12 x^2+5 x+1$
• $y^2=8 x^6+21 x^5+12 x^4+12 x^3+38 x^2+51 x+15$
• $y^2=16 x^6+42 x^5+24 x^4+24 x^3+23 x^2+49 x+30$
• $y^2=43 x^6+20 x^5+23 x^4+33 x^3+24 x^2+30 x+19$
• $y^2=33 x^6+40 x^5+46 x^4+13 x^3+48 x^2+7 x+38$
• $y^2=2 x^6+47 x^5+40 x^4+18 x^3+28 x^2+37 x+3$
• $y^2=3 x^6+25 x^5+34 x^4+49 x^3+27 x^2+10 x+35$
• $y^2=35 x^6+26 x^5+32 x^4+45 x^3+50 x^2+29 x+10$

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.ai $\times$ 1.53.i 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.ai : \(\Q(\sqrt{-37}) \).
• 1.53.i : \(\Q(\sqrt{-37}) \).

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

The base change of $A$ to $\F_{53^{2}}$ is 1.2809.bq^2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-37}) \)$)$

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.aq_go	$2$	(not in LMFDB)
2.53.q_go	$2$	(not in LMFDB)
2.53.a_abq	$4$	(not in LMFDB)