Invariants
| Base field: | $\F_{19}$ |
| Dimension: | $3$ |
| L-polynomial: | $1 - 4 x + 12 x^{2} + 44 x^{3} + 228 x^{4} - 1444 x^{5} + 6859 x^{6}$ |
| Frobenius angles: | $\pm0.252294481173$, $\pm0.318852369114$, $\pm0.785814310576$ |
| Angle rank: | $3$ (numerical) |
| Number field: | 6.0.804602263.1 |
| Galois group: | $S_4\times C_2$ |
| 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: | $3$ |
| Slopes: | $[0, 0, 0, 1, 1, 1]$ |
Point counts
Point counts of the abelian variety
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $5696$ | $48438784$ | $332799143936$ | $2244761172170752$ | $15169825546539603776$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $16$ | $370$ | $7072$ | $132162$ | $2474256$ | $47040652$ | $893782640$ | $16983182274$ | $322689097312$ | $6131066254690$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 137 hyperelliptic curves, but it is unknown how many Jacobians of non-hyperelliptic curves it contains:
- $y^2=18 x^8+13 x^7+10 x^6+12 x^5+2 x^4+16 x^3+7 x^2+5 x+16$
- $y^2=18 x^8+16 x^7+3 x^6+18 x^5+15 x^4+13 x^3+7 x^2+18 x+3$
- $y^2=18 x^8+10 x^7+5 x^6+16 x^5+13 x^4+6 x^3+4 x^2+3 x+10$
- $y^2=18 x^8+6 x^7+7 x^6+2 x^5+14 x^4+18 x^3+18 x^2+6 x+16$
- $y^2=18 x^8+10 x^7+10 x^6+15 x^5+13 x^4+13 x^3+17 x^2+12 x$
- $y^2=18 x^8+3 x^7+x^6+15 x^5+6 x^4+13 x^3+8 x^2+16 x+13$
- $y^2=18 x^7+9 x^6+12 x^5+3 x^4+8 x^3+5 x^2+4 x+1$
- $y^2=x^8+16 x^7+3 x^6+5 x^5+17 x^4+13 x^3+17 x^2+2 x+12$
- $y^2=x^8+17 x^7+3 x^5+4 x^4+13 x^3+3 x^2+14 x$
- $y^2=18 x^8+11 x^7+3 x^6+18 x^5+6 x^4+4 x^3+5 x^2+14 x$
- $y^2=x^8+15 x^7+18 x^6+18 x^5+14 x^4+10 x^3+17 x^2+3 x+10$
- $y^2=x^8+12 x^7+17 x^6+14 x^5+8 x^4+x^3+10 x^2+13 x+18$
- $y^2=18 x^7+2 x^6+10 x^4+4 x^3+6 x^2+11 x$
- $y^2=18 x^8+14 x^7+14 x^6+5 x^5+4 x^4+15 x^2+6 x+11$
- $y^2=18 x^8+10 x^7+12 x^6+16 x^5+5 x^4+16 x^3+8 x^2+10 x+15$
- $y^2=18 x^8+8 x^7+12 x^6+7 x^5+7 x^4+6 x^2+9 x+4$
- $y^2=18 x^8+18 x^7+3 x^6+12 x^5+5 x^4+8 x^3+11 x^2+17 x+2$
- $y^2=x^8+x^7+13 x^6+18 x^5+13 x^4+15 x^3+11 x^2+14 x+12$
- $y^2=x^8+x^7+17 x^6+12 x^5+17 x^4+11 x^3+12 x^2+14 x+10$
- $y^2=18 x^8+12 x^7+x^6+3 x^5+x^4+2 x^3+16 x^2+12 x+17$
- and 117 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{19}$.
Endomorphism algebra over $\F_{19}$| The endomorphism algebra of this simple isogeny class is 6.0.804602263.1. |
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 |
|---|---|---|
| 3.19.e_m_abs | $2$ | (not in LMFDB) |