Abelian variety isogeny class 2.47.au_hi over $\F_{47}$

• Label: 2.47.au_hi
• Base field: $\F_{47}$
• 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:	$\F_{47}$
Dimension:	$2$
L-polynomial:	$( 1 - 12 x + 47 x^{2} )( 1 - 8 x + 47 x^{2} )$
	$1 - 20 x + 190 x^{2} - 940 x^{3} + 2209 x^{4}$
Frobenius angles:	$\pm0.160736311100$, $\pm0.301698511018$
Angle rank:	$2$ (numerical)
Jacobians:	$54$

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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$1440$	$4838400$	$10839618720$	$23837829120000$	$52604614020247200$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$28$	$2190$	$104404$	$4885118$	$229368908$	$10779249870$	$506623098884$	$23811290125438$	$1119130526148988$	$52599132542071950$

Jacobians and polarizations

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

• $y^2=30 x^6+43 x^5+34 x^4+34 x^3+33 x^2+5 x+24$
• $y^2=2 x^6+28 x^5+21 x^4+4 x^3+2 x^2+x+8$
• $y^2=27 x^6+9 x^5+45 x^3+16 x+17$
• $y^2=23 x^6+43 x^5+18 x^4+43 x^3+34 x^2+13 x+22$
• $y^2=5 x^6+21 x^5+14 x^4+25 x^3+14 x^2+21 x+5$
• $y^2=26 x^6+6 x^5+14 x^4+2 x^3+23 x^2+21 x+5$
• $y^2=6 x^6+28 x^5+6 x^4+8 x^3+6 x^2+28 x+6$
• $y^2=46 x^6+2 x^5+22 x^4+3 x^3+22 x^2+2 x+46$
• $y^2=45 x^6+x^5+19 x^4+5 x^3+19 x^2+x+45$
• $y^2=20 x^6+11 x^5+36 x^4+18 x^3+36 x^2+11 x+20$
• $y^2=24 x^6+13 x^5+38 x^4+43 x^3+38 x^2+13 x+24$
• $y^2=19 x^6+6 x^5+7 x^4+39 x^3+16 x^2+14 x+43$
• $y^2=3 x^6+42 x^5+46 x^4+19 x^3+30 x^2+12 x+28$
• $y^2=38 x^6+7 x^5+45 x^4+26 x^3+13 x^2+2 x+10$
• $y^2=29 x^6+26 x^5+39 x^4+23 x^3+39 x^2+26 x+29$
• $y^2=43 x^6+38 x^5+2 x^4+5 x^3+2 x^2+38 x+43$
• $y^2=27 x^6+6 x^5+13 x^4+16 x^3+46 x^2+17 x+14$
• $y^2=23 x^6+21 x^5+27 x^4+27 x^2+21 x+23$
• $y^2=4 x^6+x^5+11 x^3+21 x+28$
• $y^2=35 x^6+29 x^5+5 x^4+46 x^3+14 x^2+7 x+6$
• and

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

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{47}$.

Endomorphism algebra over $\F_{47}$

The isogeny class factors as 1.47.am $\times$ 1.47.ai and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:

• 1.47.am : \(\Q(\sqrt{-11}) \).
• 1.47.ai : \(\Q(\sqrt{-31}) \).

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
2.47.ae_ac	$2$	(not in LMFDB)
2.47.e_ac	$2$	(not in LMFDB)
2.47.u_hi	$2$	(not in LMFDB)