Invariants
| Base field: | $\F_{19}$ |
| Dimension: | $3$ |
| L-polynomial: | $1 + 8 x + 57 x^{2} + 272 x^{3} + 1083 x^{4} + 2888 x^{5} + 6859 x^{6}$ |
| Frobenius angles: | $\pm0.433561326858$, $\pm0.588316326410$, $\pm0.823982815866$ |
| Angle rank: | $3$ (numerical) |
| Number field: | 6.0.5870272.1 |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $11168$ | $53963776$ | $320867618144$ | $2206988925337600$ | $15165475402110875168$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $28$ | $412$ | $6820$ | $129948$ | $2473548$ | $47062396$ | $893830868$ | $16983820476$ | $322687594492$ | $6131055578332$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 219 hyperelliptic curves, but it is unknown how many Jacobians of non-hyperelliptic curves it contains:
- $y^2=x^7+x^6+9 x^4+11 x^3+16 x$
- $y^2=x^7+x^6+10 x^5+18 x^4+11 x^3+15 x^2+x$
- $y^2=x^7+14 x^6+16 x^5+9 x^4+15 x^3+10 x^2+11 x$
- $y^2=x^7+18 x^6+6 x^5+2 x^4+16 x^3+16 x^2+17 x$
- $y^2=18 x^7+17 x^6+12 x^5+13 x^4+7 x^3+16 x^2+12 x$
- $y^2=x^7+3 x^6+3 x^5+11 x^4+18 x^3+6 x^2+8 x+7$
- $y^2=18 x^7+11 x^6+14 x^5+6 x^4+11 x^3+10 x^2+9 x+4$
- $y^2=x^8+16 x^6+5 x^5+5 x^4+6 x^3+3 x^2+5 x+6$
- $y^2=18 x^8+17 x^7+18 x^6+7 x^5+14 x^4+2 x^3+15 x^2+18 x+14$
- $y^2=x^7+9 x^6+9 x^5+8 x^4+17 x^3+15 x^2+17 x+4$
- $y^2=x^8+9 x^6+2 x^5+8 x^4+9 x^2+2 x+7$
- $y^2=x^8+x^7+14 x^6+5 x^5+7 x^4+x^3+14 x^2+5 x+6$
- $y^2=18 x^7+15 x^6+3 x^5+10 x^4+17 x^3+4 x^2+16 x+5$
- $y^2=18 x^8+5 x^7+7 x^5+11 x^4+10 x^3+16 x^2+x+6$
- $y^2=x^8+2 x^7+10 x^6+7 x^5+17 x^4+17 x^3+12 x^2+18 x+11$
- $y^2=x^8+6 x^7+5 x^6+7 x^5+11 x^4+14 x^3+6 x^2+2 x+6$
- $y^2=x^8+14 x^7+15 x^6+4 x^5+12 x^4+15 x^3+12 x^2+5 x+5$
- $y^2=x^8+10 x^7+13 x^6+12 x^5+6 x^4+4 x^3+18 x^2+5 x$
- $y^2=18 x^8+14 x^7+10 x^6+4 x^5+12 x^4+5 x^3+5 x^2+17 x$
- $y^2=x^8+10 x^7+5 x^6+4 x^5+13 x^4+6 x^3+4 x^2+16 x+5$
- and 199 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 6.0.5870272.1. |
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.ai_cf_akm | $2$ | (not in LMFDB) |