Invariants
Base field: | $\F_{2^{3}}$ |
Dimension: | $3$ |
L-polynomial: | $( 1 - 4 x + 8 x^{2} )( 1 - 9 x + 35 x^{2} - 72 x^{3} + 64 x^{4} )$ |
$1 - 13 x + 79 x^{2} - 284 x^{3} + 632 x^{4} - 832 x^{5} + 512 x^{6}$ | |
Frobenius angles: | $\pm0.0373126015494$, $\pm0.250000000000$, $\pm0.296020731784$ |
Angle rank: | $1$ (numerical) |
This isogeny class is not simple, primitive, not ordinary, and not supersingular. It is principally polarizable.
Newton polygon
$p$-rank: | $2$ |
Slopes: | $[0, 0, 1/2, 1/2, 1, 1]$ |
Point counts
Point counts of the abelian variety
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
---|---|---|---|---|---|
$A(\F_{q^r})$ | $95$ | $223535$ | $142443380$ | $70745474475$ | $35160330086725$ |
Point counts of the (virtual) curve
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
---|---|---|---|---|---|---|---|---|---|---|
$C(\F_{q^r})$ | $-4$ | $54$ | $545$ | $4218$ | $32746$ | $260583$ | $2090308$ | $16760882$ | $134201345$ | $1073781414$ |
Jacobians and polarizations
This isogeny class is principally polarizable, but does not contain a Jacobian.
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{2^{36}}$.
Endomorphism algebra over $\F_{2^{3}}$The isogeny class factors as 1.8.ae $\times$ 2.8.aj_bj 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 $\F_{2^{36}}$ is 1.68719476736.aewtd 2 $\times$ 1.68719476736.bdvoy. The endomorphism algebra for each factor is:
|
- Endomorphism algebra over $\F_{2^{6}}$
The base change of $A$ to $\F_{2^{6}}$ is 1.64.a $\times$ 2.64.al_cf. The endomorphism algebra for each factor is: - Endomorphism algebra over $\F_{2^{9}}$
The base change of $A$ to $\F_{2^{9}}$ is 1.512.bg $\times$ 2.512.a_abeb. The endomorphism algebra for each factor is: - Endomorphism algebra over $\F_{2^{12}}$
The base change of $A$ to $\F_{2^{12}}$ is 1.4096.ey $\times$ 2.4096.ah_afzr. The endomorphism algebra for each factor is: - 1.4096.ey : the quaternion algebra over \(\Q\) ramified at $2$ and $\infty$.
- 2.4096.ah_afzr : \(\Q(\sqrt{-3}, \sqrt{5})\).
- Endomorphism algebra over $\F_{2^{18}}$
The base change of $A$ to $\F_{2^{18}}$ is 1.262144.abeb 2 $\times$ 1.262144.a. The endomorphism algebra for each factor is: - 1.262144.abeb 2 : $\mathrm{M}_{2}($\(\Q(\sqrt{-15}) \)$)$
- 1.262144.a : \(\Q(\sqrt{-1}) \).
Base change
This is a primitive isogeny class.