Invariants
| Base field: | $\F_{47}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 + 47 x^{2} )( 1 + 6 x + 47 x^{2} )$ |
| $1 + 6 x + 94 x^{2} + 282 x^{3} + 2209 x^{4}$ | |
| Frobenius angles: | $\pm0.5$, $\pm0.644169619151$ |
| Angle rank: | $1$ (numerical) |
| Jacobians: | $180$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3$ |
This isogeny class is not simple, primitive, not ordinary, and not supersingular. It is principally polarizable and contains a Jacobian.
Newton polygon
| $p$-rank: | $1$ |
| Slopes: | $[0, 1/2, 1/2, 1]$ |
Point counts
Point counts of the abelian variety
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $2592$ | $5225472$ | $10714013856$ | $23794876514304$ | $52604473222376352$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $54$ | $2362$ | $103194$ | $4876318$ | $229368294$ | $10779233722$ | $506623161546$ | $23811285550846$ | $1119130419281238$ | $52599132610972282$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 180 curves (of which all are hyperelliptic):
- $y^2=44 x^6+32 x^5+15 x^4+19 x^3+32 x^2+18 x+16$
- $y^2=15 x^5+19 x^4+32 x^3+28 x^2+24 x+29$
- $y^2=19 x^6+13 x^5+22 x^4+7 x^3+3 x^2+15 x+35$
- $y^2=29 x^6+12 x^5+10 x^4+20 x^3+18 x^2+21 x+3$
- $y^2=18 x^6+20 x^5+3 x^4+42 x^3+22 x^2+2 x+36$
- $y^2=28 x^6+22 x^5+4 x^4+32 x^3+34 x^2+15 x+17$
- $y^2=40 x^6+17 x^5+12 x^4+38 x^3+12 x^2+17 x+40$
- $y^2=31 x^6+8 x^5+26 x^4+37 x^3+11 x^2+33 x+29$
- $y^2=34 x^6+29 x^5+12 x^4+29 x^3+30 x^2+29 x+27$
- $y^2=37 x^6+42 x^5+6 x^4+22 x^3+x^2+9 x+3$
- $y^2=18 x^6+7 x^5+13 x^4+35 x^3+13 x^2+7 x+18$
- $y^2=7 x^6+40 x^5+32 x^4+38 x^3+18 x^2+27 x+24$
- $y^2=36 x^6+21 x^5+x^4+11 x^3+7 x^2+42 x+34$
- $y^2=39 x^6+42 x^5+x^4+37 x^3+x^2+42 x+39$
- $y^2=37 x^6+23 x^5+33 x^4+40 x^3+15 x^2+40 x+7$
- $y^2=30 x^6+29 x^5+3 x^4+37 x^3+14 x^2+31 x+20$
- $y^2=8 x^6+46 x^5+39 x^4+46 x^3+39 x^2+46 x+8$
- $y^2=21 x^6+12 x^5+42 x^4+33 x^3+36 x^2+26 x+11$
- $y^2=30 x^6+15 x^5+6 x^4+20 x^3+42 x^2+30 x+44$
- $y^2=5 x^6+22 x^5+34 x^4+13 x^3+34 x^2+22 x+5$
- and 160 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{47^{2}}$.
Endomorphism algebra over $\F_{47}$| The isogeny class factors as 1.47.a $\times$ 1.47.g and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is: |
The base change of $A$ to $\F_{47^{2}}$ is 1.2209.cg $\times$ 1.2209.dq. The endomorphism algebra for each factor is:
|
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.ag_dq | $2$ | (not in LMFDB) |