Properties

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

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Invariants

Base field:  $\F_{73}$
Dimension:  $2$
L-polynomial:  $( 1 - 11 x + 73 x^{2} )( 1 - 3 x + 73 x^{2} )$
  $1 - 14 x + 179 x^{2} - 1022 x^{3} + 5329 x^{4}$
Frobenius angles:  $\pm0.277387524567$, $\pm0.443825842026$
Angle rank:  $2$ (numerical)
Jacobians:  $180$
Cyclic group of points:    no
Non-cyclic primes:   $3$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $4473$ $29275785$ $152000126208$ $806514648734025$ $4297545699113247273$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $60$ $5492$ $390726$ $28400164$ $2073032940$ $151334223374$ $11047398259692$ $806460039037636$ $58871586217718358$ $4297625832047594132$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 180 curves (of which all are hyperelliptic):

  • $y^2=43 x^6+14 x^5+20 x^4+66 x^3+67 x^2+40 x+14$
  • $y^2=71 x^6+24 x^5+68 x^4+28 x^3+19 x^2+23 x+33$
  • $y^2=10 x^6+21 x^5+53 x^4+26 x^3+42 x^2+25 x+11$
  • $y^2=13 x^6+70 x^5+67 x^4+14 x^3+27 x^2+44 x+17$
  • $y^2=22 x^6+13 x^5+16 x^4+70 x^3+64 x^2+62 x+21$
  • $y^2=10 x^6+43 x^5+5 x^4+31 x^3+31 x^2+36 x+68$
  • $y^2=15 x^6+70 x^5+52 x^4+20 x^3+28 x^2+19 x+5$
  • $y^2=42 x^6+68 x^5+63 x^4+x^3+51 x^2+5 x+40$
  • $y^2=51 x^6+52 x^5+64 x^4+33 x^3+36 x^2+30 x+46$
  • $y^2=43 x^6+14 x^5+40 x^4+51 x^3+14 x^2+5 x+51$
  • $y^2=20 x^6+23 x^5+21 x^4+35 x^3+29 x^2+20 x+15$
  • $y^2=40 x^6+60 x^5+53 x^4+49 x^3+32 x^2+37$
  • $y^2=60 x^6+72 x^5+x^4+41 x^3+18 x^2+18 x+36$
  • $y^2=44 x^6+8 x^5+70 x^4+33 x^3+16 x^2+41 x+14$
  • $y^2=65 x^6+55 x^5+55 x^4+55 x^3+3 x^2+36 x+46$
  • $y^2=17 x^6+62 x^5+52 x^4+41 x^3+22 x^2+20 x+26$
  • $y^2=28 x^6+8 x^5+53 x^4+32 x^3+20 x^2+8 x+45$
  • $y^2=43 x^6+31 x^5+34 x^4+21 x^3+62 x^2+47 x+15$
  • $y^2=43 x^6+20 x^5+5 x^4+66 x^3+56 x^2+14 x+27$
  • $y^2=x^6+24 x^5+2 x^4+19 x^3+20 x^2+57 x+3$
  • and 160 more

Decomposition and endomorphism algebra

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

Endomorphism algebra over $\F_{73}$
The isogeny class factors as 1.73.al $\times$ 1.73.ad and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:

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.ai_ej$2$(not in LMFDB)
2.73.i_ej$2$(not in LMFDB)
2.73.o_gx$2$(not in LMFDB)