Invariants
Base field: | $\F_{5}$ |
Dimension: | $4$ |
L-polynomial: | $( 1 - 2 x + 5 x^{2} )( 1 - 4 x + 5 x^{2} )^{3}$ |
$1 - 14 x + 92 x^{2} - 370 x^{3} + 998 x^{4} - 1850 x^{5} + 2300 x^{6} - 1750 x^{7} + 625 x^{8}$ | |
Frobenius angles: | $\pm0.147583617650$, $\pm0.147583617650$, $\pm0.147583617650$, $\pm0.352416382350$ |
Angle rank: | $1$ (numerical) |
This isogeny class is not 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
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
---|---|---|---|---|---|
$A(\F_{q^r})$ | $32$ | $256000$ | $268745504$ | $167772160000$ | $99932932273952$ |
Point counts of the (virtual) curve
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
---|---|---|---|---|---|---|---|---|---|---|
$C(\F_{q^r})$ | $-8$ | $14$ | $136$ | $682$ | $3272$ | $16094$ | $79736$ | $394842$ | $1959832$ | $9766574$ |
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 $\F_{5^{4}}$.
Endomorphism algebra over $\F_{5}$The isogeny class factors as 1.5.ae 3 $\times$ 1.5.ac 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 $\F_{5^{4}}$ is 1.625.o 4 and its endomorphism algebra is $\mathrm{M}_{4}($\(\Q(\sqrt{-1}) \)$)$ |
- Endomorphism algebra over $\F_{5^{2}}$
The base change of $A$ to $\F_{5^{2}}$ is 1.25.ag 3 $\times$ 1.25.g. The endomorphism algebra for each factor is: - 1.25.ag 3 : $\mathrm{M}_{3}($\(\Q(\sqrt{-1}) \)$)$
- 1.25.g : \(\Q(\sqrt{-1}) \).
Base change
This is a primitive isogeny class.