Invariants
| Base field: | $\F_{7}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 2 x - 2 x^{2} - 14 x^{3} + 49 x^{4}$ |
| Frobenius angles: | $\pm0.0805195460407$, $\pm0.700955651792$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.2312.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $4$ |
| Isomorphism classes: | 8 |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
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: | $2$ |
| Slopes: | $[0, 0, 1, 1]$ |
Point counts
Point counts of the abelian variety
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $32$ | $2048$ | $97952$ | $5832704$ | $281130912$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $6$ | $42$ | $282$ | $2430$ | $16726$ | $117066$ | $825642$ | $5765310$ | $40354662$ | $282536362$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 4 curves (of which all are hyperelliptic):
- $y^2=x^6+3 x^5+4 x^4+3 x^2+2 x+3$
- $y^2=6 x^6+x^5+x^4+2 x^3+2 x^2+4 x+5$
- $y^2=2 x^6+x^5+x^4+6 x^3+4 x^2+2 x+1$
- $y^2=3 x^6+6 x^5+6 x^3+x^2+4 x+3$
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{7}$.
Endomorphism algebra over $\F_{7}$| The endomorphism algebra of this simple isogeny class is 4.0.2312.1. |
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 |
|---|---|---|
| 2.7.c_ac | $2$ | 2.49.ai_bu |