Invariants
Base field: | $\F_{5}$ |
Dimension: | $4$ |
L-polynomial: | $( 1 - 3 x + 5 x^{2} )( 1 + 5 x^{2} )( 1 - 4 x + 5 x^{2} )^{2}$ |
$1 - 11 x + 60 x^{2} - 213 x^{3} + 550 x^{4} - 1065 x^{5} + 1500 x^{6} - 1375 x^{7} + 625 x^{8}$ | |
Frobenius angles: | $\pm0.147583617650$, $\pm0.147583617650$, $\pm0.265942140215$, $\pm0.5$ |
Angle rank: | $2$ (numerical) |
This isogeny class is not simple, primitive, not ordinary, and not supersingular. It is principally polarizable.
Newton polygon
$p$-rank: | $3$ |
Slopes: | $[0, 0, 0, 1/2, 1/2, 1, 1, 1]$ |
Point counts
Point counts of the abelian variety
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
---|---|---|---|---|---|
$A(\F_{q^r})$ | $72$ | $388800$ | $270055296$ | $159252480000$ | $102015994462632$ |
Point counts of the (virtual) curve
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
---|---|---|---|---|---|---|---|---|---|---|
$C(\F_{q^r})$ | $-5$ | $25$ | $136$ | $653$ | $3335$ | $16270$ | $78731$ | $390333$ | $1955080$ | $9775825$ |
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 $\F_{5^{2}}$.
Endomorphism algebra over $\F_{5}$The isogeny class factors as 1.5.ae 2 $\times$ 1.5.ad $\times$ 1.5.a and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:
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The base change of $A$ to $\F_{5^{2}}$ is 1.25.ag 2 $\times$ 1.25.b $\times$ 1.25.k. The endomorphism algebra for each factor is:
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Base change
This is a primitive isogeny class.