Properties

Label 2.97.ae_bm
Base field $\F_{97}$
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:  $\F_{97}$
Dimension:  $2$
L-polynomial:  $1 - 4 x + 38 x^{2} - 388 x^{3} + 9409 x^{4}$
Frobenius angles:  $\pm0.233071056064$, $\pm0.681812833544$
Angle rank:  $2$ (numerical)
Number field:  4.0.4761600.1
Galois group:  $D_{4}$
Jacobians:  $624$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $9056$ $89111040$ $832267129184$ $7840153263513600$ $73744242814677013856$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $94$ $9470$ $911902$ $88559998$ $8587553374$ $832970826110$ $80798290845982$ $7837433458325758$ $760231055405790814$ $73742412695229924350$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 624 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

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

Endomorphism algebra over $\F_{97}$
The endomorphism algebra of this simple isogeny class is 4.0.4761600.1.

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.e_bm$2$(not in LMFDB)