Invariants
| Base field: | $\F_{11}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + x - 3 x^{2} + 11 x^{3} + 121 x^{4}$ |
| Frobenius angles: | $\pm0.261040734536$, $\pm0.813330154394$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.3233717.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $9$ |
| Isomorphism classes: | 9 |
| Cyclic group of points: | yes |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $131$ | $14017$ | $1830725$ | $220417325$ | $25885203856$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $13$ | $115$ | $1375$ | $15051$ | $160728$ | $1773487$ | $19474573$ | $214331331$ | $2357955475$ | $25937239830$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 9 curves (of which all are hyperelliptic):
- $y^2=5 x^6+8 x^5+6 x^4+3 x^3+8 x+7$
- $y^2=9 x^6+x^5+7 x^4+6 x^3+6 x^2+7$
- $y^2=6 x^6+6 x^5+3 x^4+2 x^3+9 x^2+4 x+9$
- $y^2=3 x^6+7 x^5+10 x^4+3 x^3+x^2+4 x+9$
- $y^2=3 x^6+6 x^5+4 x^4+5 x^3+10 x^2+2 x+3$
- $y^2=9 x^6+9 x^5+6 x^4+6 x^3+6 x^2+5 x$
- $y^2=8 x^6+10 x^5+6 x^4+4 x^3+10 x^2+5 x+2$
- $y^2=3 x^6+5 x^5+6 x^4+3 x^3+6 x^2+7 x+3$
- $y^2=8 x^6+4 x^5+10 x^3+10 x^2+2 x+2$
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{11}$.
Endomorphism algebra over $\F_{11}$| The endomorphism algebra of this simple isogeny class is 4.0.3233717.1. |
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 |
|---|---|---|
| 2.11.ab_ad | $2$ | 2.121.ah_iv |