Properties

Label 2.83.m_hu
Base field $\F_{83}$
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:  $\F_{83}$
Dimension:  $2$
L-polynomial:  $( 1 + 6 x + 83 x^{2} )^{2}$
  $1 + 12 x + 202 x^{2} + 996 x^{3} + 6889 x^{4}$
Frobenius angles:  $\pm0.606810309697$, $\pm0.606810309697$
Angle rank:  $1$ (numerical)
Jacobians:  $150$
Cyclic group of points:    no
Non-cyclic primes:   $2, 3, 5$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $8100$ $49280400$ $325481660100$ $2251996007040000$ $15517024442473702500$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $96$ $7150$ $569232$ $47452078$ $3939290256$ $326939393950$ $27136036148352$ $2252292402478558$ $186940255477329216$ $15516041171808940750$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 150 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

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

Endomorphism algebra over $\F_{83}$
The isogeny class factors as 1.83.g 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-74}) \)$)$

Base change

This is a primitive isogeny class.

Twists

Below are some of the twists of this isogeny class.

TwistExtension degreeCommon base change
2.83.am_hu$2$(not in LMFDB)
2.83.a_fa$2$(not in LMFDB)
2.83.ag_abv$3$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.83.am_hu$2$(not in LMFDB)
2.83.a_fa$2$(not in LMFDB)
2.83.ag_abv$3$(not in LMFDB)
2.83.a_afa$4$(not in LMFDB)
2.83.g_abv$6$(not in LMFDB)