Properties

Label 2.83.an_ex
Base field $\F_{83}$
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:  $\F_{83}$
Dimension:  $2$
L-polynomial:  $1 - 13 x + 127 x^{2} - 1079 x^{3} + 6889 x^{4}$
Frobenius angles:  $\pm0.175733013427$, $\pm0.544056787362$
Angle rank:  $2$ (numerical)
Number field:  4.0.5026229.1
Galois group:  $D_{4}$
Jacobians:  $161$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $5925$ $48045825$ $326666408175$ $2252125225108125$ $15516815667075570000$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $71$ $6975$ $571307$ $47454803$ $3939237256$ $326942271675$ $27136050214477$ $2252292217364083$ $186940255867721141$ $15516041182970811750$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 161 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{83}$.

Endomorphism algebra over $\F_{83}$
The endomorphism algebra of this simple isogeny class is 4.0.5026229.1.

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.83.n_ex$2$(not in LMFDB)