Properties

Label 2.7.ac_ab
Base Field $\F_{7}$
Dimension $2$
$p$-rank $2$
Principally polarizable
Contains a Jacobian

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Invariants

Base field:  $\F_{7}$
Dimension:  $2$
Weil polynomial:  $( 1 - 5 x + 7 x^{2} )( 1 + 3 x + 7 x^{2} )$
Frobenius angles:  $\pm0.106147807505$, $\pm0.691875465479$
Angle rank:  $2$ (numerical)

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
$A(\F_{q^r})$ 33 2145 99792 5888025 283484553 13803229440 680577121257 33254534795625 1628533327207248 79810774019058225

Point counts of the curve

$r$ 1 2 3 4 5 6 7 8 9 10
$C(\F_{q^r})$ 6 44 288 2452 16866 117326 826398 5768548 40356576 282540764

Decomposition

1.7.af $\times$ 1.7.d

Base change

This is a primitive isogeny class.