Invariants
Base field: | $\F_{2^{9}}$ |
Dimension: | $1$ |
L-polynomial: | $1 + 7 x + 512 x^{2}$ |
Frobenius angles: | $\pm0.549434528160$ |
Angle rank: | $1$ (numerical) |
Number field: | \(\Q(\sqrt{-1999}) \) |
Galois group: | $C_2$ |
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
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
---|---|---|---|---|---|
$A(\F_{q^r})$ | $520$ | $263120$ | $134207320$ | $68719050400$ | $35184380402600$ |
$r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
---|---|---|---|---|---|---|---|---|---|---|
$C(\F_{q^r})$ | $520$ | $263120$ | $134207320$ | $68719050400$ | $35184380402600$ | $18014398669570160$ | $9223372031477509880$ | $4722366482825320929600$ | $2417851639232321779556680$ | $1237940039285381524921571600$ |
Jacobians and polarizations
This isogeny class contains a Jacobian, and hence is principally polarizable.
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{2^{9}}$.
Endomorphism algebra over $\F_{2^{9}}$The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-1999}) \). |
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 |
---|---|---|
1.512.ah | $2$ | (not in LMFDB) |