Properties

Label 2.43.e_cc
Base field $\F_{43}$
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:  $\F_{43}$
Dimension:  $2$
L-polynomial:  $( 1 - 4 x + 43 x^{2} )( 1 + 8 x + 43 x^{2} )$
  $1 + 4 x + 54 x^{2} + 172 x^{3} + 1849 x^{4}$
Frobenius angles:  $\pm0.401344489543$, $\pm0.708828274828$
Angle rank:  $2$ (numerical)
Jacobians:  $288$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $2080$ $3594240$ $6315880480$ $11695081881600$ $21607425843546400$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $48$ $1942$ $79440$ $3420814$ $146980848$ $6321206374$ $271820507664$ $11688202178206$ $502592579893680$ $21611482302310582$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 288 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{43}$.

Endomorphism algebra over $\F_{43}$
The isogeny class factors as 1.43.ae $\times$ 1.43.i 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
2.43.am_eo$2$(not in LMFDB)
2.43.ae_cc$2$(not in LMFDB)
2.43.m_eo$2$(not in LMFDB)
2.43.ar_fi$3$(not in LMFDB)
2.43.b_co$3$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.43.am_eo$2$(not in LMFDB)
2.43.ae_cc$2$(not in LMFDB)
2.43.m_eo$2$(not in LMFDB)
2.43.ar_fi$3$(not in LMFDB)
2.43.b_co$3$(not in LMFDB)
2.43.aj_bi$6$(not in LMFDB)
2.43.aj_ec$6$(not in LMFDB)
2.43.ab_co$6$(not in LMFDB)
2.43.j_bi$6$(not in LMFDB)
2.43.j_ec$6$(not in LMFDB)
2.43.r_fi$6$(not in LMFDB)