Properties

Label 2.97.e_hq
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

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Invariants

Base field:  $\F_{97}$
Dimension:  $2$
L-polynomial:  $( 1 + 2 x + 97 x^{2} )^{2}$
  $1 + 4 x + 198 x^{2} + 388 x^{3} + 9409 x^{4}$
Frobenius angles:  $\pm0.532375263179$, $\pm0.532375263179$
Angle rank:  $1$ (numerical)
Jacobians:  $257$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $10000$ $92160000$ $831926410000$ $7834374144000000$ $73743962592330250000$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $102$ $9790$ $911526$ $88494718$ $8587520742$ $832974996670$ $80798260987686$ $7837433351159038$ $760231061419572582$ $73742412707554949950$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 257 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

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

Endomorphism algebra over $\F_{97}$
The isogeny class factors as 1.97.c 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-6}) \)$)$

Base change

This is a primitive isogeny class.

Twists

Below are some of the twists of this isogeny class.

TwistExtension degreeCommon base change
2.97.ae_hq$2$(not in LMFDB)
2.97.a_hi$2$(not in LMFDB)
2.97.ac_adp$3$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.97.ae_hq$2$(not in LMFDB)
2.97.a_hi$2$(not in LMFDB)
2.97.ac_adp$3$(not in LMFDB)
2.97.a_ahi$4$(not in LMFDB)
2.97.c_adp$6$(not in LMFDB)