Invariants
Base field: | $\F_{2}$ |
Dimension: | $4$ |
L-polynomial: | $1 - 4 x + 5 x^{2} + 2 x^{3} - 11 x^{4} + 4 x^{5} + 20 x^{6} - 32 x^{7} + 16 x^{8}$ |
Frobenius angles: | $\pm0.0247483856139$, $\pm0.177336015878$, $\pm0.344002682545$, $\pm0.858081718947$ |
Angle rank: | $2$ (numerical) |
Number field: | 8.0.22581504.2 |
Galois group: | $D_4\times C_2$ |
Jacobians: | $0$ |
Isomorphism classes: | 1 |
This isogeny class is simple but not geometrically simple, primitive, ordinary, and not supersingular. It is principally polarizable.
Newton polygon
This isogeny class is ordinary.
$p$-rank: | $4$ |
Slopes: | $[0, 0, 0, 0, 1, 1, 1, 1]$ |
Point counts
Point counts of the abelian variety
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
---|---|---|---|---|---|
$A(\F_{q^r})$ | $1$ | $61$ | $5044$ | $76921$ | $660661$ |
Point counts of the (virtual) curve
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
---|---|---|---|---|---|---|---|---|---|---|
$C(\F_{q^r})$ | $-1$ | $-1$ | $11$ | $19$ | $19$ | $65$ | $97$ | $291$ | $479$ | $959$ |
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 $\F_{2^{12}}$.
Endomorphism algebra over $\F_{2}$The endomorphism algebra of this simple isogeny class is 8.0.22581504.2. |
The base change of $A$ to $\F_{2^{12}}$ is 2.4096.ahm_zkj 2 and its endomorphism algebra is $\mathrm{M}_{2}($4.0.4752.1$)$ |
- Endomorphism algebra over $\F_{2^{2}}$
The base change of $A$ to $\F_{2^{2}}$ is the simple isogeny class 4.4.ag_t_abq_dd and its endomorphism algebra is 8.0.22581504.2. - Endomorphism algebra over $\F_{2^{3}}$
The base change of $A$ to $\F_{2^{3}}$ is the simple isogeny class 4.8.c_c_ak_aep and its endomorphism algebra is 8.0.22581504.2. - Endomorphism algebra over $\F_{2^{4}}$
The base change of $A$ to $\F_{2^{4}}$ is the simple isogeny class 4.16.c_t_adq_adr and its endomorphism algebra is 8.0.22581504.2. - Endomorphism algebra over $\F_{2^{6}}$
The base change of $A$ to $\F_{2^{6}}$ is the simple isogeny class 4.64.a_ahm_a_zkj and its endomorphism algebra is 8.0.22581504.2.
Base change
This is a primitive isogeny class.