Invariants
| Base field: | $\F_{47}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 6 x + 47 x^{2} )( 1 + 8 x + 47 x^{2} )$ |
| $1 + 2 x + 46 x^{2} + 94 x^{3} + 2209 x^{4}$ | |
| Frobenius angles: | $\pm0.355830380849$, $\pm0.698301488982$ |
| Angle rank: | $2$ (numerical) |
| Jacobians: | $252$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 7$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $2352$ | $5080320$ | $10780488432$ | $23833610035200$ | $52593977458615152$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $50$ | $2298$ | $103838$ | $4884254$ | $229322530$ | $10778854266$ | $506624415886$ | $23811292693246$ | $1119130485044306$ | $52599132610319418$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 252 curves (of which all are hyperelliptic):
- $y^2=8 x^6+5 x^5+10 x^4+15 x^3+41 x^2+22 x+15$
- $y^2=35 x^6+15 x^5+8 x^4+21 x^3+32 x^2+34 x+21$
- $y^2=32 x^5+6 x^4+43 x^3+27 x^2+9 x+12$
- $y^2=33 x^6+23 x^5+19 x^4+23 x^3+34 x^2+40 x+9$
- $y^2=36 x^6+4 x^5+37 x^4+26 x^3+37 x^2+4 x+36$
- $y^2=37 x^6+23 x^5+3 x^4+46 x^2+17 x+8$
- $y^2=44 x^6+15 x^5+42 x^4+23 x^3+9 x^2+31 x+43$
- $y^2=19 x^6+8 x^5+25 x^4+18 x^3+44 x^2+22 x+40$
- $y^2=27 x^6+37 x^5+14 x^4+24 x^3+24 x^2+20 x+19$
- $y^2=11 x^6+19 x^5+22 x^4+13 x^3+33 x^2+29 x+20$
- $y^2=24 x^6+12 x^5+26 x^4+29 x^3+41 x^2+24 x+7$
- $y^2=8 x^6+19 x^5+35 x^4+16 x^3+36 x^2+20 x+31$
- $y^2=12 x^6+22 x^5+37 x^4+34 x^3+34 x^2+35 x+41$
- $y^2=25 x^6+19 x^5+2 x^4+24 x^3+2 x^2+3 x+27$
- $y^2=9 x^6+22 x^5+43 x^4+32 x^3+13 x^2+19 x+46$
- $y^2=20 x^6+32 x^5+16 x^4+40 x^3+37 x^2+x+4$
- $y^2=9 x^6+30 x^5+41 x^4+15 x^3+44 x^2+44 x+43$
- $y^2=28 x^6+10 x^5+39 x^4+21 x^3+18 x^2+8 x+5$
- $y^2=27 x^6+39 x^5+28 x^4+12 x^3+8 x^2+27 x+11$
- $y^2=8 x^5+24 x^4+14 x^3+17 x^2+3 x+5$
- and 232 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.ag $\times$ 1.47.i 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.ao_fm | $2$ | (not in LMFDB) |
| 2.47.ac_bu | $2$ | (not in LMFDB) |
| 2.47.o_fm | $2$ | (not in LMFDB) |