Invariants
| Base field: | $\F_{13}$ |
| Dimension: | $3$ |
| L-polynomial: | $1 - 3 x + 3 x^{2} + 25 x^{3} + 39 x^{4} - 507 x^{5} + 2197 x^{6}$ |
| Frobenius angles: | $\pm0.176419801313$, $\pm0.372027052593$, $\pm0.809147045189$ |
| Angle rank: | $3$ (numerical) |
| Number field: | 6.0.299976183.1 |
| Galois group: | $A_4\times C_2$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $3$ |
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: | $3$ |
| Slopes: | $[0, 0, 0, 1, 1, 1]$ |
Point counts
Point counts of the abelian variety
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $1755$ | $4782375$ | $10978488495$ | $23681484084375$ | $51024119179067775$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $11$ | $167$ | $2273$ | $29027$ | $370121$ | $4831799$ | $62757524$ | $815798579$ | $10604667929$ | $137856757907$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 52 hyperelliptic curves, but it is unknown how many Jacobians of non-hyperelliptic curves it contains:
- $y^2=x^7+2 x^5+5 x^4+x^3+8 x^2+2 x+11$
- $y^2=2 x^7+5 x^5+10 x^4+3 x^3+10 x^2+11 x+7$
- $y^2=x^7+5 x^5+7 x^4+2 x^3+3 x^2+8 x+5$
- $y^2=x^7+12 x^5+12 x^4+8 x^3+7 x^2+10 x+7$
- $y^2=x^7+8 x^5+11 x^3+9 x^2+5 x+8$
- $y^2=x^7+3 x^5+2 x^4+4 x^3+9 x^2+11 x+7$
- $y^2=2 x^7+7 x^5+2 x^4+8 x^3+11 x^2+2 x+8$
- $y^2=2 x^7+8 x^5+9 x^4+10 x^3+9 x^2+7 x+5$
- $y^2=2 x^7+12 x^5+11 x^4+3 x^3+x+11$
- $y^2=x^7+5 x^5+8 x^4+12 x^3+11 x^2+11 x+11$
- $y^2=2 x^7+x^5+2 x^4+10 x^3+7 x^2+11 x+8$
- $y^2=2 x^7+4 x^5+12 x^4+6 x^3+8 x^2+3 x+11$
- $y^2=2 x^7+9 x^5+4 x^4+6 x^3+3 x^2+8 x+11$
- $y^2=x^7+4 x^5+7 x^4+6 x^2+4 x+10$
- $y^2=2 x^7+2 x^5+8 x^3+11 x^2+4 x+7$
- $y^2=2 x^7+5 x^5+2 x^4+11 x^3+8 x^2+10 x+8$
- $y^2=2 x^7+x^5+8 x^4+3 x^2+11$
- $y^2=2 x^7+10 x^5+12 x^4+10 x^3+6 x^2+5 x+11$
- $y^2=x^7+4 x^3+10 x^2+1$
- $y^2=2 x^7+2 x^5+12 x^4+x^3+9 x^2+x+8$
- and 32 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{13}$.
Endomorphism algebra over $\F_{13}$| The endomorphism algebra of this simple isogeny class is 6.0.299976183.1. |
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 |
|---|---|---|
| 3.13.d_d_az | $2$ | (not in LMFDB) |