Invariants
Base field: | $\F_{5}$ |
Dimension: | $4$ |
L-polynomial: | $( 1 - x + 5 x^{2} )( 1 - 4 x + 5 x^{2} )^{3}$ |
$1 - 13 x + 80 x^{2} - 307 x^{3} + 814 x^{4} - 1535 x^{5} + 2000 x^{6} - 1625 x^{7} + 625 x^{8}$ | |
Frobenius angles: | $\pm0.147583617650$, $\pm0.147583617650$, $\pm0.147583617650$, $\pm0.428216853436$ |
Angle rank: | $2$ (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
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
---|---|---|---|---|---|
$A(\F_{q^r})$ | $40$ | $280000$ | $254218720$ | $155975680000$ | $99309172184200$ |
Point counts of the (virtual) curve
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
---|---|---|---|---|---|---|---|---|---|---|
$C(\F_{q^r})$ | $-7$ | $17$ | $128$ | $637$ | $3253$ | $16382$ | $80353$ | $394077$ | $1954928$ | $9763097$ |
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 $\F_{5}$.
Endomorphism algebra over $\F_{5}$The isogeny class factors as 1.5.ae 3 $\times$ 1.5.ab and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:
|
Base change
This is a primitive isogeny class.