Invariants
Base field: | $\F_{7^{3}}$ |
Dimension: | $1$ |
L-polynomial: | $1 - 36 x + 343 x^{2}$ |
Frobenius angles: | $\pm0.0756263964363$ |
Angle rank: | $1$ (numerical) |
Number field: | \(\Q(\sqrt{-19}) \) |
Galois group: | $C_2$ |
Jacobians: | $4$ |
This isogeny class is simple and geometrically simple, not primitive, ordinary, and not supersingular. It is principally polarizable and contains a Jacobian.
Newton polygon
This isogeny class is ordinary.
$p$-rank: | $1$ |
Slopes: | $[0, 1]$ |
Point counts
Point counts of the abelian variety
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
---|---|---|---|---|---|
$A(\F_{q^r})$ | $308$ | $117040$ | $40343996$ | $13841150400$ | $4747559881988$ |
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
---|---|---|---|---|---|---|---|---|---|---|
$C(\F_{q^r})$ | $308$ | $117040$ | $40343996$ | $13841150400$ | $4747559881988$ | $1628413586227120$ | $558545864221073036$ | $191581231389534201600$ | $65712362363809858842068$ | $22539340290699102970145200$ |
Jacobians and polarizations
This isogeny class contains the Jacobians of 4 curves (of which all are hyperelliptic), and hence is principally polarizable:
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{7^{3}}$.
Endomorphism algebra over $\F_{7^{3}}$The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-19}) \). |
Base change
This isogeny class is not primitive. It is a base change from the following isogeny classes over subfields of $\F_{7^{3}}$.
Subfield | Primitive Model |
$\F_{7}$ | 1.7.d |
Twists
Below is a list of all twists of this isogeny class.
Twist | Extension degree | Common base change |
---|---|---|
1.343.bk | $2$ | (not in LMFDB) |