Properties

Label 2.73.aj_dn
Base field $\F_{73}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple yes
Geometrically simple yes
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

Related objects

Downloads

Learn more

Invariants

Base field:  $\F_{73}$
Dimension:  $2$
L-polynomial:  $1 - 9 x + 91 x^{2} - 657 x^{3} + 5329 x^{4}$
Frobenius angles:  $\pm0.219762022329$, $\pm0.578559616360$
Angle rank:  $2$ (numerical)
Number field:  \(\Q(\sqrt{-786 +18 \sqrt{301}})\)
Galois group:  $D_{4}$
Jacobians:  $144$
Isomorphism classes:  144
Cyclic group of points:    yes

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $4755$ $28943685$ $151239969315$ $806574393487125$ $4297983769551212400$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $65$ $5431$ $388775$ $28402267$ $2073244250$ $151334716039$ $11047391154515$ $806460073031443$ $58871586610362485$ $4297625823090505486$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 144 curves (of which all are hyperelliptic):

  • $y^2=62 x^6+63 x^5+26 x^4+37 x^3+29 x^2+12 x+3$
  • $y^2=44 x^6+69 x^5+21 x^4+19 x^3+46 x^2+72 x+58$
  • $y^2=69 x^6+5 x^5+72 x^4+11 x^3+37 x^2+67 x+49$
  • $y^2=10 x^6+28 x^5+43 x^4+11 x^3+8 x^2+62 x+66$
  • $y^2=2 x^6+46 x^5+29 x^4+68 x^3+35 x^2+15 x+45$
  • $y^2=32 x^6+60 x^5+45 x^4+x^3+3 x^2+66 x+2$
  • $y^2=21 x^6+69 x^5+53 x^4+18 x^3+7 x^2+20 x+4$
  • $y^2=51 x^6+16 x^5+25 x^4+69 x^3+61 x^2+37 x+2$
  • $y^2=42 x^6+26 x^5+27 x^4+38 x^3+50 x^2+32 x+9$
  • $y^2=36 x^6+49 x^5+6 x^4+24 x^3+58 x^2+71 x+51$
  • $y^2=51 x^6+50 x^5+3 x^4+38 x^3+51 x^2+38 x+47$
  • $y^2=28 x^6+56 x^5+27 x^4+x^3+24 x^2+40 x+31$
  • $y^2=10 x^6+10 x^5+51 x^4+33 x^3+59 x^2+9 x+26$
  • $y^2=47 x^6+39 x^5+42 x^4+68 x^3+52 x^2+51 x+7$
  • $y^2=43 x^6+69 x^5+51 x^4+48 x^3+65 x^2+39 x+12$
  • $y^2=55 x^6+38 x^5+34 x^4+43 x^3+69 x^2+23 x+20$
  • $y^2=8 x^6+12 x^5+5 x^4+72 x^3+17 x^2+43 x+14$
  • $y^2=61 x^6+71 x^5+24 x^4+17 x^3+27 x^2+6 x+43$
  • $y^2=18 x^6+7 x^5+6 x^4+3 x^3+51 x^2+7 x+54$
  • $y^2=43 x^6+27 x^5+9 x^4+12 x^3+12 x^2+47 x+30$
  • and 124 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{73}$.

Endomorphism algebra over $\F_{73}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-786 +18 \sqrt{301}})\).

Base change

This is a primitive isogeny class.

Twists

Below is a list of all twists of this isogeny class.

TwistExtension degreeCommon base change
2.73.j_dn$2$(not in LMFDB)