Invariants
| Base field: | $\F_{47}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 12 x + 82 x^{2} + 564 x^{3} + 2209 x^{4}$ |
| Frobenius angles: | $\pm0.478435144664$, $\pm0.891900187401$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-8 + \sqrt{3}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $150$ |
| 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: | $2$ |
| Slopes: | $[0, 0, 1, 1]$ |
Point counts
Point counts of the abelian variety
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $2868$ | $4921488$ | $10828056564$ | $23785984594944$ | $52595943002830068$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $60$ | $2230$ | $104292$ | $4874494$ | $229331100$ | $10779499510$ | $506622742980$ | $23811287193214$ | $1119130368124284$ | $52599133037140150$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 150 curves (of which all are hyperelliptic):
- $y^2=26 x^6+34 x^5+40 x^4+22 x^3+5 x^2+2 x+36$
- $y^2=4 x^6+7 x^5+36 x^4+20 x^3+43 x^2+10 x+18$
- $y^2=6 x^6+42 x^5+43 x^4+35 x^3+40 x^2+31 x+14$
- $y^2=32 x^6+35 x^5+46 x^4+24 x^3+46 x^2+11 x+12$
- $y^2=3 x^6+30 x^5+39 x^4+14 x^3+26 x^2+26 x+24$
- $y^2=32 x^6+26 x^5+10 x^4+41 x^3+4 x^2+15 x+23$
- $y^2=39 x^6+17 x^5+21 x^4+36 x^2+3 x+25$
- $y^2=46 x^6+19 x^5+8 x^4+12 x^3+13 x^2+11 x+3$
- $y^2=46 x^6+42 x^5+x^4+4 x^3+35 x^2+35 x+38$
- $y^2=3 x^6+42 x^5+3 x^3+15 x^2+41 x+6$
- $y^2=21 x^6+31 x^5+x^4+19 x^3+12 x^2+8 x+41$
- $y^2=13 x^6+32 x^5+34 x^4+29 x^3+46 x^2+43 x+28$
- $y^2=9 x^6+44 x^5+36 x^4+33 x^3+25 x^2+14 x+12$
- $y^2=25 x^6+38 x^5+20 x^4+26 x^3+25 x^2+18 x+2$
- $y^2=40 x^6+16 x^3+25 x^2+12 x+35$
- $y^2=5 x^6+23 x^5+40 x^4+4 x^3+43 x^2+32 x+15$
- $y^2=28 x^6+9 x^5+10 x^4+5 x^3+22 x^2+45 x+9$
- $y^2=24 x^6+42 x^5+17 x^4+31 x^3+37 x^2+17 x+19$
- $y^2=16 x^6+10 x^5+14 x^4+31 x^3+39 x^2+36 x+13$
- $y^2=34 x^6+36 x^5+12 x^4+36 x^3+16 x+42$
- and 130 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{47}$.
Endomorphism algebra over $\F_{47}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-8 + \sqrt{3}})\). |
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.am_de | $2$ | (not in LMFDB) |