Invariants
| Base field: | $\F_{47}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 2 x + 67 x^{2} - 94 x^{3} + 2209 x^{4}$ |
| Frobenius angles: | $\pm0.348259740906$, $\pm0.601330634977$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.19732496.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $138$ |
| Isomorphism classes: | 138 |
| Cyclic group of points: | yes |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $2181$ | $5175513$ | $10790715600$ | $23812085043369$ | $52601301209030421$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $46$ | $2340$ | $103936$ | $4879844$ | $229354466$ | $10778946750$ | $506621717438$ | $23811302381764$ | $1119130552406272$ | $52599131802605700$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 138 curves (of which all are hyperelliptic):
- $y^2=6 x^6+43 x^5+25 x^4+14 x^3+21 x^2+4 x+23$
- $y^2=29 x^6+25 x^5+38 x^4+3 x^3+2 x+20$
- $y^2=21 x^6+5 x^5+23 x^4+36 x^3+31 x^2+41 x+9$
- $y^2=17 x^6+26 x^5+4 x^4+20 x^3+36 x^2+44 x+17$
- $y^2=27 x^6+23 x^4+24 x^3+2 x^2+37 x+13$
- $y^2=4 x^6+25 x^4+11 x^3+37 x^2+35 x+17$
- $y^2=41 x^6+27 x^5+43 x^4+32 x^3+46 x^2+34 x+5$
- $y^2=28 x^6+4 x^5+11 x^4+24 x^3+30 x^2+21 x+42$
- $y^2=42 x^6+5 x^5+45 x^4+39 x^3+3 x^2+38 x+46$
- $y^2=22 x^6+5 x^5+35 x^4+24 x^3+17 x^2+36 x+17$
- $y^2=35 x^6+5 x^5+13 x^4+15 x^3+18 x^2+16 x+22$
- $y^2=9 x^6+3 x^5+20 x^4+45 x^3+43 x^2+11 x+35$
- $y^2=16 x^6+26 x^5+10 x^4+4 x^3+2 x^2+43 x+28$
- $y^2=27 x^6+5 x^5+7 x^4+6 x^3+28 x^2+18 x+7$
- $y^2=45 x^6+14 x^5+14 x^4+32 x^3+4 x^2+4 x+19$
- $y^2=30 x^6+13 x^5+14 x^4+32 x^3+6 x^2+14 x+39$
- $y^2=3 x^6+24 x^5+44 x^4+40 x^3+40 x^2+9 x+20$
- $y^2=8 x^6+23 x^5+22 x^4+23 x^3+43 x^2+15 x+25$
- $y^2=29 x^6+19 x^5+20 x^4+36 x^3+10 x^2+30 x+32$
- $y^2=17 x^6+37 x^5+35 x^4+43 x^3+13 x^2+29 x+37$
- and 118 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 4.0.19732496.1. |
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.c_cp | $2$ | (not in LMFDB) |