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

• Label: 2.47.a_ack
• Base field: $\F_{47}$
• Dimension: $2$
• $p$-rank: $2$
• Ordinary: yes
• Supersingular: no
• Simple: yes
• Geometrically simple: no
• Primitive: yes
• Principally polarizable: yes
• Contains a Jacobian: yes

Invariants

Base field:	$\F_{47}$
Dimension:	$2$
L-polynomial:	$1 - 62 x^{2} + 2209 x^{4}$
Frobenius angles:	$\pm0.135368257275$, $\pm0.864631742725$
Angle rank:	$1$ (numerical)
Number field:	\(\Q(\sqrt{-2}, \sqrt{39})\)
Galois group:	$C_2^2$
Jacobians:	$48$

This isogeny class is simple but not 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

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$2148$	$4613904$	$10779387876$	$23816898625536$	$52599132439328868$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$48$	$2086$	$103824$	$4880830$	$229345008$	$10779560422$	$506623120464$	$23811305521534$	$1119130473102768$	$52599132642827686$

Jacobians and polarizations

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

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

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

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{47^{2}}$.

Endomorphism algebra over $\F_{47}$

The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-2}, \sqrt{39})\).

Endomorphism algebra over $\overline{\F}_{47}$

The base change of $A$ to $\F_{47^{2}}$ is 1.2209.ack^2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-78}) \)$)$

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.a_ck	$4$	(not in LMFDB)
2.47.ai_bg	$8$	(not in LMFDB)
2.47.i_bg	$8$	(not in LMFDB)