Invariants
Base field: | $\F_{2^{2}}$ |
Dimension: | $3$ |
L-polynomial: | $( 1 - 2 x )^{2}( 1 - 3 x + 4 x^{2} )( 1 + 2 x + 4 x^{2} )$ |
$1 - 5 x + 10 x^{2} - 16 x^{3} + 40 x^{4} - 80 x^{5} + 64 x^{6}$ | |
Frobenius angles: | $0$, $0$, $\pm0.230053456163$, $\pm0.666666666667$ |
Angle rank: | $1$ (numerical) |
This isogeny class is not simple, primitive, not ordinary, and not supersingular. It is principally polarizable.
Newton polygon
$p$-rank: | $1$ |
Slopes: | $[0, 1/2, 1/2, 1/2, 1/2, 1]$ |
Point counts
Point counts of the abelian variety
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
---|---|---|---|---|---|
$A(\F_{q^r})$ | $14$ | $3024$ | $177674$ | $17690400$ | $1099070714$ |
Point counts of the (virtual) curve
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
---|---|---|---|---|---|---|---|---|---|---|
$C(\F_{q^r})$ | $0$ | $12$ | $42$ | $272$ | $1050$ | $3888$ | $16170$ | $64832$ | $259098$ | $1046352$ |
Jacobians and polarizations
This isogeny class is principally polarizable, but it is unknown whether it contains a Jacobian.
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{2^{6}}$.
Endomorphism algebra over $\F_{2^{2}}$The isogeny class factors as 1.4.ae $\times$ 1.4.ad $\times$ 1.4.c and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:
|
The base change of $A$ to $\F_{2^{6}}$ is 1.64.aq 2 $\times$ 1.64.j. The endomorphism algebra for each factor is:
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Base change
This is a primitive isogeny class.