Invariants
| Base field: | $\F_{47}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 16 x + 146 x^{2} + 752 x^{3} + 2209 x^{4}$ |
| Frobenius angles: | $\pm0.607323405967$, $\pm0.815172949491$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.21312.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $62$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $3124$ | $4960912$ | $10711374388$ | $23821267554304$ | $52599282259289524$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $64$ | $2246$ | $103168$ | $4881726$ | $229345664$ | $10779320198$ | $506621258816$ | $23811296128894$ | $1119130513119424$ | $52599131381668166$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 62 curves (of which all are hyperelliptic):
- $y^2=39 x^6+24 x^5+38 x^4+17 x^3+21 x^2+23 x+4$
- $y^2=40 x^6+31 x^5+34 x^4+25 x^3+24 x^2+24 x+37$
- $y^2=29 x^6+36 x^5+30 x^4+17 x^3+24 x^2+4 x+8$
- $y^2=7 x^6+29 x^5+33 x^4+17 x^3+29 x^2+8 x+17$
- $y^2=9 x^6+19 x^5+23 x^4+15 x^3+24 x^2+22 x+23$
- $y^2=4 x^6+17 x^5+33 x^3+19 x^2+x+37$
- $y^2=23 x^6+18 x^5+25 x^4+4 x^3+5 x^2+5 x+42$
- $y^2=15 x^6+25 x^5+34 x^4+5 x^3+40 x^2+8 x+8$
- $y^2=16 x^6+35 x^5+35 x^4+15 x^3+25 x^2+40 x+21$
- $y^2=33 x^6+46 x^5+17 x^4+45 x^3+9 x^2+37 x+17$
- $y^2=26 x^5+13 x^4+27 x^3+13 x^2+45 x+34$
- $y^2=20 x^6+39 x^5+45 x^4+x^3+16 x^2+21 x+24$
- $y^2=23 x^5+35 x^4+31 x^3+41 x^2+36 x+7$
- $y^2=x^6+28 x^5+38 x^4+23 x^3+32 x^2+8 x$
- $y^2=6 x^6+19 x^5+6 x^4+3 x^3+26 x^2+20 x+32$
- $y^2=26 x^6+40 x^5+44 x^4+x^3+24 x^2+5 x+17$
- $y^2=3 x^6+19 x^5+6 x^4+9 x^3+34 x^2+21 x+38$
- $y^2=18 x^6+14 x^5+17 x^4+30 x^3+46 x^2+10 x+1$
- $y^2=26 x^6+11 x^5+16 x^4+42 x^3+10 x^2+9 x+33$
- $y^2=9 x^6+35 x^5+26 x^4+19 x^3+19 x^2+21 x+35$
- and 42 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 4.0.21312.1. |
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.aq_fq | $2$ | (not in LMFDB) |