Properties

Label 2.97.o_gg
Base field $\F_{97}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple no
Geometrically simple no
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

Related objects

Downloads

Learn more

Invariants

Base field:  $\F_{97}$
Dimension:  $2$
L-polynomial:  $( 1 - 2 x + 97 x^{2} )( 1 + 16 x + 97 x^{2} )$
  $1 + 14 x + 162 x^{2} + 1358 x^{3} + 9409 x^{4}$
Frobenius angles:  $\pm0.467624736821$, $\pm0.801772189629$
Angle rank:  $2$ (numerical)
Jacobians:  $784$
Cyclic group of points:    no
Non-cyclic primes:   $2, 3$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $10944$ $89740800$ $832986286272$ $7837229187072000$ $73740046859620979904$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $112$ $9538$ $912688$ $88526974$ $8587064752$ $832975012546$ $80798290006000$ $7837433425605886$ $760231058629736176$ $73742412681375818818$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 784 curves (of which all are hyperelliptic):

  • $y^2=47 x^6+80 x^5+31 x^4+66 x^3+34 x^2+36 x+25$
  • $y^2=27 x^6+45 x^5+85 x^4+61 x^3+90 x^2+54 x+90$
  • $y^2=95 x^6+90 x^5+10 x^4+41 x^3+58 x^2+94 x+77$
  • $y^2=56 x^6+42 x^5+74 x^4+40 x^3+47 x^2+52 x+7$
  • $y^2=7 x^6+76 x^5+43 x^4+38 x^3+16 x^2+57 x+32$
  • $y^2=93 x^6+32 x^5+71 x^4+28 x^3+5 x^2+45 x+17$
  • $y^2=22 x^6+89 x^5+4 x^4+7 x^3+13 x^2+10 x+86$
  • $y^2=95 x^6+43 x^5+69 x^4+35 x^3+50 x^2+88 x+75$
  • $y^2=44 x^6+94 x^5+63 x^4+13 x^3+91 x^2+16$
  • $y^2=58 x^6+79 x^5+74 x^4+37 x^3+54 x^2+81 x+92$
  • $y^2=7 x^6+73 x^5+76 x^4+2 x^3+76 x^2+73 x+7$
  • $y^2=75 x^6+61 x^5+33 x^4+86 x^3+60 x^2+54 x+91$
  • $y^2=53 x^6+34 x^5+71 x^4+6 x^3+67 x^2+50 x+61$
  • $y^2=12 x^6+72 x^5+83 x^4+88 x^3+26 x^2+44 x+63$
  • $y^2=86 x^6+40 x^5+89 x^4+31 x^3+5 x^2+53 x+41$
  • $y^2=84 x^6+30 x^5+13 x^4+52 x^3+76 x^2+28 x+10$
  • $y^2=49 x^6+57 x^5+3 x^4+11 x^3+53 x^2+2 x+61$
  • $y^2=32 x^6+72 x^5+81 x^4+63 x^3+94 x^2+90 x+38$
  • $y^2=9 x^6+25 x^5+5 x^4+15 x^3+12 x^2+68 x+83$
  • $y^2=23 x^6+23 x^5+70 x^4+23 x^3+62 x^2+30 x+82$
  • and 764 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{97}$.

Endomorphism algebra over $\F_{97}$
The isogeny class factors as 1.97.ac $\times$ 1.97.q 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
2.97.as_is$2$(not in LMFDB)
2.97.ao_gg$2$(not in LMFDB)
2.97.s_is$2$(not in LMFDB)