Properties

Label 3.5.b_l_j
Base field $\F_{5}$
Dimension $3$
$p$-rank $3$
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:  $\F_{5}$
Dimension:  $3$
L-polynomial:  $1 + x + 11 x^{2} + 9 x^{3} + 55 x^{4} + 25 x^{5} + 125 x^{6}$
Frobenius angles:  $\pm0.375907326846$, $\pm0.517028019698$, $\pm0.685443043629$
Angle rank:  $3$ (numerical)
Number field:  6.0.490372119.1
Galois group:  $S_4\times C_2$
Jacobians:  $2$
Cyclic group of points:    yes

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:  $3$
Slopes:  $[0, 0, 0, 1, 1, 1]$

Point counts

Point counts of the abelian variety

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $227$ $35639$ $1866167$ $238389271$ $30052498447$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $7$ $47$ $121$ $611$ $3077$ $15455$ $78596$ $390803$ $1953013$ $9772067$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 2 curves (of which 1 is hyperelliptic):

  • $y^2=x^7+4 x^5+4 x^3+2 x^2+4 x+2$
  • $2 x^4+3 x^3 z+x^2 y^2+3 x^2 y z+4 x^2 z^2+x y z^2+x z^3+y^3 z=0$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{5}$.

Endomorphism algebra over $\F_{5}$
The endomorphism algebra of this simple isogeny class is 6.0.490372119.1.

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
3.5.ab_l_aj$2$3.25.v_if_bzd