Properties

Label 2.3.c_c
Base Field $\F_{3}$
Dimension $2$
$p$-rank $2$
Principally polarizable
Contains a Jacobian

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Invariants

Base field:  $\F_{3}$
Dimension:  $2$
Weil polynomial:  $1 + 2 x + 2 x^{2} + 6 x^{3} + 9 x^{4}$
Frobenius angles:  $\pm0.383860236401$, $\pm0.883860236401$
Angle rank:  $1$ (numerical)
Number field:  \(\Q(i, \sqrt{5})\)
Galois group:  $V_4$

This isogeny class is simple.

Newton polygon

This isogeny class is ordinary.

$p$-rank:  $2$
Slopes:  $[0, 0, 1, 1]$

Point counts

This isogeny class contains a Jacobian, and hence is principally polarizable.

Point counts of the abelian variety

$r$ 1 2 3 4 5 6 7 8 9 10
$A(\F_{q^r})$ 20 80 1220 6400 50500 531920 4726420 45158400 382764020 3486722000

Point counts of the curve

$r$ 1 2 3 4 5 6 7 8 9 10
$C(\F_{q^r})$ 6 10 42 78 206 730 2162 6878 19446 59050

Decomposition

This is a simple isogeny class.

Base change

This is a primitive isogeny class.