Invariants
| Base field: | $\F_{47}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 14 x^{2} + 2209 x^{4}$ |
| Frobenius angles: | $\pm0.226207552479$, $\pm0.773792447521$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{3}, \sqrt{-5})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $224$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3$ |
This isogeny class is simple but not 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $2196$ | $4822416$ | $10779305364$ | $23852518281216$ | $52599131924022036$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $48$ | $2182$ | $103824$ | $4888126$ | $229345008$ | $10779395398$ | $506623120464$ | $23811270529918$ | $1119130473102768$ | $52599131612214022$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 224 curves (of which all are hyperelliptic):
- $y^2=x^6+42 x^5+4 x^4+9 x^3+5 x^2+2 x+19$
- $y^2=5 x^6+22 x^5+20 x^4+45 x^3+25 x^2+10 x+1$
- $y^2=7 x^6+21 x^5+12 x^4+18 x^3+46 x^2+10$
- $y^2=35 x^6+11 x^5+13 x^4+43 x^3+42 x^2+3$
- $y^2=12 x^6+45 x^4+46 x^3+8 x^2+31$
- $y^2=40 x^6+31 x^5+42 x^4+34 x^3+17 x^2+11 x+42$
- $y^2=12 x^6+14 x^5+22 x^4+29 x^3+38 x^2+8 x+22$
- $y^2=26 x^6+5 x^5+37 x^4+37 x^3+15 x^2+12 x+26$
- $y^2=20 x^6+13 x^5+31 x^4+15 x^3+24 x^2+41 x+3$
- $y^2=12 x^6+25 x^5+27 x^4+21 x^3+26 x^2+33 x+40$
- $y^2=13 x^6+31 x^5+41 x^4+11 x^3+36 x^2+24 x+12$
- $y^2=29 x^6+25 x^5+21 x^4+4 x^3+29 x^2+27 x+36$
- $y^2=30 x^6+44 x^5+22 x^4+31 x^3+4 x^2+10 x+16$
- $y^2=41 x^6+23 x^5+25 x^4+17 x^3+29 x^2+22 x+28$
- $y^2=41 x^6+45 x^5+30 x^4+33 x^3+2 x^2+10 x+28$
- $y^2=17 x^6+37 x^5+9 x^4+24 x^3+10 x^2+3 x+46$
- $y^2=43 x^6+37 x^5+30 x^4+34 x^3+30 x^2+42 x+5$
- $y^2=27 x^6+44 x^5+9 x^4+29 x^3+9 x^2+22 x+25$
- $y^2=20 x^6+38 x^5+38 x^4+32 x^3+19 x^2+7 x+29$
- $y^2=x^6+x^3+19$
- and 204 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{47^{2}}$.
Endomorphism algebra over $\F_{47}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{3}, \sqrt{-5})\). |
| The base change of $A$ to $\F_{47^{2}}$ is 1.2209.ao 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-15}) \)$)$ |
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 |
|---|---|---|
| 2.47.a_o | $4$ | (not in LMFDB) |
| 2.47.as_fz | $12$ | (not in LMFDB) |
| 2.47.s_fz | $12$ | (not in LMFDB) |