Invariants
| Base field: | $\F_{47}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 7 x + 47 x^{2} )( 1 + 3 x + 47 x^{2} )$ |
| $1 - 4 x + 73 x^{2} - 188 x^{3} + 2209 x^{4}$ | |
| Frobenius angles: | $\pm0.329450163008$, $\pm0.570213408102$ |
| Angle rank: | $2$ (numerical) |
| Jacobians: | $165$ |
| Cyclic group of points: | yes |
This isogeny class is not 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $2091$ | $5175225$ | $10804916304$ | $23809269515625$ | $52602232156243131$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $44$ | $2340$ | $104072$ | $4879268$ | $229358524$ | $10779059070$ | $506620883092$ | $23811292574788$ | $1119130600849304$ | $52599132239717700$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 165 curves (of which all are hyperelliptic):
- $y^2=18 x^6+19 x^5+29 x^4+40 x^3+13 x^2+44 x+7$
- $y^2=30 x^6+21 x^5+29 x^4+14 x^3+30 x^2+27 x+23$
- $y^2=10 x^6+6 x^5+39 x^4+x^3+40 x^2+9 x+19$
- $y^2=26 x^6+45 x^5+14 x^4+32 x^3+23 x^2+37 x+18$
- $y^2=26 x^6+29 x^5+22 x^4+20 x^3+39 x^2+5 x+5$
- $y^2=38 x^6+13 x^5+8 x^4+40 x^3+21 x^2+11 x+13$
- $y^2=20 x^6+36 x^5+24 x^4+37 x^3+20 x^2+2 x+17$
- $y^2=42 x^6+43 x^5+36 x^4+23 x^3+5 x^2+16 x+22$
- $y^2=40 x^6+32 x^5+33 x^4+3 x^3+44 x^2+38 x+4$
- $y^2=39 x^6+8 x^5+18 x^4+x^3+32 x^2+16 x+29$
- $y^2=16 x^6+26 x^5+36 x^4+31 x^3+4 x^2+36 x+15$
- $y^2=11 x^6+25 x^5+40 x^4+43 x^3+38 x^2+25 x+40$
- $y^2=8 x^6+36 x^4+38 x^3+45 x^2+18 x+41$
- $y^2=46 x^6+42 x^5+29 x^4+32 x^3+13 x^2+28 x+44$
- $y^2=34 x^6+39 x^5+16 x^4+25 x^3+8 x^2+45 x+16$
- $y^2=43 x^6+45 x^4+46 x^3+26 x^2+21 x+18$
- $y^2=28 x^6+26 x^5+14 x^4+3 x^3+25 x^2+18 x+22$
- $y^2=39 x^6+39 x^5+11 x^4+34 x^3+7 x^2+44 x+40$
- $y^2=13 x^6+43 x^5+24 x^4+36 x^3+21 x^2+41 x+20$
- $y^2=39 x^6+32 x^5+7 x^4+22 x^3+19 x^2+30 x+40$
- and 145 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{47}$.
Endomorphism algebra over $\F_{47}$| The isogeny class factors as 1.47.ah $\times$ 1.47.d and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. 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.ak_el | $2$ | (not in LMFDB) |
| 2.47.e_cv | $2$ | (not in LMFDB) |
| 2.47.k_el | $2$ | (not in LMFDB) |