Properties

Label 2.97.o_gp
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

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Invariants

Base field:  $\F_{97}$
Dimension:  $2$
L-polynomial:  $1 + 14 x + 171 x^{2} + 1358 x^{3} + 9409 x^{4}$
Frobenius angles:  $\pm0.475975441990$, $\pm0.787926659627$
Angle rank:  $2$ (numerical)
Number field:  4.0.3659328.2
Galois group:  $D_{4}$
Jacobians:  $216$
Cyclic group of points:    no
Non-cyclic primes:   $3$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $10953$ $89913177$ $832641276816$ $7837323163526889$ $73740263256307116153$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $112$ $9556$ $912310$ $88528036$ $8587089952$ $832974842878$ $80798292666112$ $7837433346095044$ $760231059231560182$ $73742412686049550516$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 216 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 4.0.3659328.2.

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.ao_gp$2$(not in LMFDB)