Invariants
Base field: | $\F_{23}$ |
Dimension: | $1$ |
L-polynomial: | $1 - x + 23 x^{2}$ |
Frobenius angles: | $\pm0.466753484570$ |
Angle rank: | $1$ (numerical) |
Number field: | \(\Q(\sqrt{-91}) \) |
Galois group: | $C_2$ |
Jacobians: | $2$ |
Isomorphism classes: | 2 |
This isogeny class is simple and geometrically simple, 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
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
---|---|---|---|---|---|
$A(\F_{q^r})$ | $23$ | $575$ | $12236$ | $278875$ | $6433813$ |
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
---|---|---|---|---|---|---|---|---|---|---|
$C(\F_{q^r})$ | $23$ | $575$ | $12236$ | $278875$ | $6433813$ | $148055600$ | $3404903371$ | $78310609875$ | $1801150493828$ | $41426517680375$ |
Jacobians and polarizations
This isogeny class contains the Jacobians of 2 curves (of which all are hyperelliptic), and hence is principally polarizable:
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{23}$.
Endomorphism algebra over $\F_{23}$The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-91}) \). |
Base change
This is a primitive isogeny class.
Twists
Below is a list of all twists of this isogeny class.
Twist | Extension degree | Common base change |
---|---|---|
1.23.b | $2$ | (not in LMFDB) |