Invariants
| Base field: | $\F_{47}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 6 x + 62 x^{2} + 282 x^{3} + 2209 x^{4}$ |
| Frobenius angles: | $\pm0.420161527555$, $\pm0.740544606279$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-138 +6 \sqrt{41}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $176$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $2560$ | $5079040$ | $10773598720$ | $23821103923200$ | $52588401242636800$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $54$ | $2298$ | $103770$ | $4881694$ | $229298214$ | $10779192186$ | $506625712458$ | $23811281296126$ | $1119130454487510$ | $52599132000373818$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 176 curves (of which all are hyperelliptic):
- $y^2=11 x^6+39 x^5+31 x^4+5 x^3+36 x^2+7 x+33$
- $y^2=10 x^6+5 x^5+34 x^4+17 x^2+9 x+24$
- $y^2=26 x^6+27 x^5+12 x^4+4 x^3+10 x^2+16 x+39$
- $y^2=7 x^6+23 x^5+28 x^4+23 x^3+7 x^2+24 x+39$
- $y^2=21 x^6+33 x^5+16 x^4+3 x^3+12 x^2+37 x$
- $y^2=2 x^6+21 x^4+39 x^3+13 x^2+35 x+23$
- $y^2=34 x^6+10 x^5+9 x^4+11 x^3+43 x^2+30 x+1$
- $y^2=18 x^6+10 x^5+19 x^4+6 x^3+3 x^2+28 x+5$
- $y^2=38 x^6+24 x^5+7 x^4+22 x^3+4 x^2+31 x+20$
- $y^2=8 x^6+3 x^5+27 x^4+5 x^3+2 x^2+34 x+28$
- $y^2=30 x^6+38 x^5+8 x^4+27 x^3+5 x^2+41 x+37$
- $y^2=45 x^6+36 x^5+46 x^4+4 x^3+35 x^2+35 x+34$
- $y^2=14 x^6+43 x^5+5 x^4+22 x^3+32 x^2+23 x+17$
- $y^2=23 x^6+9 x^5+37 x^4+41 x^3+10 x^2+30 x+43$
- $y^2=x^6+4 x^5+x^4+4 x^3+32 x^2+44 x+8$
- $y^2=24 x^6+41 x^5+2 x^4+25 x^3+28 x^2+27 x+23$
- $y^2=15 x^6+42 x^5+34 x^4+13 x^3+2 x^2+21 x+30$
- $y^2=2 x^6+9 x^5+16 x^4+43 x^3+7 x^2+25 x+12$
- $y^2=35 x^5+30 x^4+31 x^3+29 x^2+4 x+8$
- $y^2=33 x^6+11 x^5+35 x^4+2 x^3+42 x^2+7 x+46$
- and 156 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 \(\Q(\sqrt{-138 +6 \sqrt{41}})\). |
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_ck | $2$ | (not in LMFDB) |