Invariants
Base field: | $\F_{2}$ |
Dimension: | $5$ |
L-polynomial: | $( 1 - 2 x + 2 x^{2} )( 1 - x + 2 x^{2} )( 1 - 4 x + 9 x^{2} - 15 x^{3} + 18 x^{4} - 16 x^{5} + 8 x^{6} )$ |
$1 - 7 x + 27 x^{2} - 72 x^{3} + 145 x^{4} - 230 x^{5} + 290 x^{6} - 288 x^{7} + 216 x^{8} - 112 x^{9} + 32 x^{10}$ | |
Frobenius angles: | $\pm0.0435981566527$, $\pm0.250000000000$, $\pm0.329312442367$, $\pm0.384973271919$, $\pm0.527830414776$ |
Angle rank: | $1$ (numerical) |
Jacobians: | $0$ |
Isomorphism classes: | 1 |
This isogeny class is not simple, primitive, not ordinary, and not supersingular. It is principally polarizable.
Newton polygon
$p$-rank: | $4$ |
Slopes: | $[0, 0, 0, 0, 1/2, 1/2, 1, 1, 1, 1]$ |
Point counts
Point counts of the abelian variety
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
---|---|---|---|---|---|
$A(\F_{q^r})$ | $2$ | $2840$ | $76622$ | $823600$ | $23110142$ |
Point counts of the (virtual) curve
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
---|---|---|---|---|---|---|---|---|---|---|
$C(\F_{q^r})$ | $-4$ | $10$ | $17$ | $14$ | $21$ | $43$ | $87$ | $230$ | $548$ | $1035$ |
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 $\F_{2^{28}}$.
Endomorphism algebra over $\F_{2}$The isogeny class factors as 1.2.ac $\times$ 1.2.ab $\times$ 3.2.ae_j_ap 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 $\F_{2^{28}}$ is 1.268435456.blhf 4 $\times$ 1.268435456.bwmi. The endomorphism algebra for each factor is:
|
- Endomorphism algebra over $\F_{2^{2}}$
The base change of $A$ to $\F_{2^{2}}$ is 1.4.a $\times$ 1.4.d $\times$ 3.4.c_ad_an. The endomorphism algebra for each factor is: - Endomorphism algebra over $\F_{2^{4}}$
The base change of $A$ to $\F_{2^{4}}$ is 1.16.ab $\times$ 1.16.i $\times$ 3.16.ak_bl_adt. The endomorphism algebra for each factor is: - 1.16.ab : \(\Q(\sqrt{-7}) \).
- 1.16.i : the quaternion algebra over \(\Q\) ramified at $2$ and $\infty$.
- 3.16.ak_bl_adt : \(\Q(\zeta_{7})\).
- Endomorphism algebra over $\F_{2^{7}}$
The base change of $A$ to $\F_{2^{7}}$ is 1.128.aq $\times$ 1.128.an 3 $\times$ 1.128.n. The endomorphism algebra for each factor is: - 1.128.aq : \(\Q(\sqrt{-1}) \).
- 1.128.an 3 : $\mathrm{M}_{3}($\(\Q(\sqrt{-7}) \)$)$
- 1.128.n : \(\Q(\sqrt{-7}) \).
- Endomorphism algebra over $\F_{2^{14}}$
The base change of $A$ to $\F_{2^{14}}$ is 1.16384.a $\times$ 1.16384.dj 4 . The endomorphism algebra for each factor is: - 1.16384.a : \(\Q(\sqrt{-1}) \).
- 1.16384.dj 4 : $\mathrm{M}_{4}($\(\Q(\sqrt{-7}) \)$)$
Base change
This is a primitive isogeny class.