Invariants
| Base field: | $\F_{47}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 65 x^{2} + 2209 x^{4}$ |
| Frobenius angles: | $\pm0.371522557458$, $\pm0.628477442542$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{29}, \sqrt{-159})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $266$ |
| Cyclic group of points: | yes |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $2275$ | $5175625$ | $10779059200$ | $23813180015625$ | $52599131948783875$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $48$ | $2340$ | $103824$ | $4880068$ | $229345008$ | $10778903070$ | $506623120464$ | $23811306105988$ | $1119130473102768$ | $52599131661737700$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 266 curves (of which all are hyperelliptic):
- $y^2=14 x^6+6 x^5+12 x^4+14 x^3+42 x^2+9 x+9$
- $y^2=23 x^6+30 x^5+13 x^4+23 x^3+22 x^2+45 x+45$
- $y^2=8 x^6+7 x^5+15 x^4+3 x^3+18 x^2+27 x+33$
- $y^2=22 x^6+25 x^5+22 x^4+14 x^3+6 x^2+23 x+41$
- $y^2=16 x^6+31 x^5+16 x^4+23 x^3+30 x^2+21 x+17$
- $y^2=17 x^6+21 x^5+30 x^4+21 x^3+3 x^2+10 x+37$
- $y^2=38 x^6+11 x^5+9 x^4+11 x^3+15 x^2+3 x+44$
- $y^2=29 x^6+31 x^5+29 x^4+37 x^3+43 x^2+42 x+31$
- $y^2=4 x^6+14 x^5+4 x^4+44 x^3+27 x^2+22 x+14$
- $y^2=6 x^6+13 x^5+27 x^4+6 x^3+16 x^2+13 x+8$
- $y^2=30 x^6+18 x^5+41 x^4+30 x^3+33 x^2+18 x+40$
- $y^2=35 x^6+5 x^5+27 x^4+40 x^3+12 x^2+23 x+37$
- $y^2=34 x^6+25 x^5+41 x^4+12 x^3+13 x^2+21 x+44$
- $y^2=33 x^6+40 x^5+38 x^4+22 x^3+45 x^2+33 x+22$
- $y^2=24 x^6+12 x^5+2 x^4+16 x^3+37 x^2+24 x+16$
- $y^2=6 x^6+34 x^5+9 x^4+30 x^3+15 x^2+18 x+23$
- $y^2=30 x^6+29 x^5+45 x^4+9 x^3+28 x^2+43 x+21$
- $y^2=31 x^6+11 x^5+33 x^4+3 x^3+28 x^2+35 x+23$
- $y^2=14 x^6+8 x^5+24 x^4+15 x^3+46 x^2+34 x+21$
- $y^2=3 x^6+34 x^5+44 x^4+31 x^3+23 x^2+13 x+10$
- and 246 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 \(\Q(\sqrt{29}, \sqrt{-159})\). |
| The base change of $A$ to $\F_{47^{2}}$ is 1.2209.cn 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-4611}) \)$)$ |
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_acn | $4$ | (not in LMFDB) |