Properties

Label 2.97.e_acg
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:  $( 1 - 14 x + 97 x^{2} )( 1 + 18 x + 97 x^{2} )$
  $1 + 4 x - 58 x^{2} + 388 x^{3} + 9409 x^{4}$
Frobenius angles:  $\pm0.248359198326$, $\pm0.866875061252$
Angle rank:  $2$ (numerical)
Jacobians:  $446$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $9744$ $87306240$ $834730605072$ $7839269196595200$ $73742775457886770704$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $102$ $9278$ $914598$ $88550014$ $8587382502$ $832973533886$ $80798254665510$ $7837433590848766$ $760231055948838246$ $73742412697292441918$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 446 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.ao $\times$ 1.97.s 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 are some of the twists of this isogeny class.

TwistExtension degreeCommon base change
2.97.abg_re$2$(not in LMFDB)
2.97.ae_acg$2$(not in LMFDB)
2.97.bg_re$2$(not in LMFDB)
2.97.n_ea$3$(not in LMFDB)
2.97.bl_uq$3$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.97.abg_re$2$(not in LMFDB)
2.97.ae_acg$2$(not in LMFDB)
2.97.bg_re$2$(not in LMFDB)
2.97.n_ea$3$(not in LMFDB)
2.97.bl_uq$3$(not in LMFDB)
2.97.aw_lu$4$(not in LMFDB)
2.97.ag_de$4$(not in LMFDB)
2.97.g_de$4$(not in LMFDB)
2.97.w_lu$4$(not in LMFDB)
2.97.abl_uq$6$(not in LMFDB)
2.97.ax_ky$6$(not in LMFDB)
2.97.an_ea$6$(not in LMFDB)
2.97.ab_afs$6$(not in LMFDB)
2.97.b_afs$6$(not in LMFDB)
2.97.x_ky$6$(not in LMFDB)
2.97.abb_ni$12$(not in LMFDB)
2.97.an_ja$12$(not in LMFDB)
2.97.al_bq$12$(not in LMFDB)
2.97.ad_fy$12$(not in LMFDB)
2.97.d_fy$12$(not in LMFDB)
2.97.l_bq$12$(not in LMFDB)
2.97.n_ja$12$(not in LMFDB)
2.97.bb_ni$12$(not in LMFDB)