Invariants
| Base field: | $\F_{43}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 4 x + 22 x^{2} + 172 x^{3} + 1849 x^{4}$ |
| Frobenius angles: | $\pm0.341988799982$, $\pm0.785425898825$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.160973.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $224$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $2048$ | $3473408$ | $6346508288$ | $11704718065664$ | $21605826661337088$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $48$ | $1878$ | $79824$ | $3423630$ | $146969968$ | $6321304614$ | $271818276624$ | $11688200592030$ | $502592699230896$ | $21611482122770038$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 224 curves (of which all are hyperelliptic):
- $y^2=36 x^6+11 x^5+25 x^4+20 x^3+40 x^2+4$
- $y^2=16 x^6+21 x^5+42 x^4+42 x^3+30 x^2+23 x+2$
- $y^2=11 x^6+33 x^5+9 x^3+24 x^2+41 x+20$
- $y^2=2 x^6+6 x^5+27 x^4+38 x^3+19 x^2+26 x+29$
- $y^2=19 x^6+7 x^5+7 x^4+21 x^3+2 x^2+25 x+4$
- $y^2=27 x^6+4 x^5+7 x^4+24 x^3+15 x^2+3 x+31$
- $y^2=30 x^6+22 x^5+17 x^4+9 x^3+25 x^2+3 x+4$
- $y^2=8 x^6+19 x^5+31 x^4+11 x^3+26 x^2+19 x+20$
- $y^2=29 x^6+28 x^5+25 x^4+2 x^3+35 x^2+30 x+27$
- $y^2=33 x^6+8 x^5+12 x^4+41 x^3+x^2+10 x+22$
- $y^2=10 x^6+25 x^5+12 x^4+14 x^3+29 x^2+x+14$
- $y^2=2 x^5+35 x^4+x^3+20 x^2+9 x+14$
- $y^2=19 x^6+14 x^5+21 x^2+11 x+24$
- $y^2=26 x^6+36 x^5+33 x^4+40 x^3+10 x^2+10 x+6$
- $y^2=37 x^6+29 x^5+28 x^4+13 x^3+8 x^2+38$
- $y^2=7 x^6+39 x^5+2 x^4+14 x^3+25 x^2+28 x+29$
- $y^2=16 x^6+32 x^5+26 x^4+40 x^3+12 x^2+26 x+23$
- $y^2=13 x^6+26 x^5+4 x^4+15 x^3+8 x^2+42 x+26$
- $y^2=14 x^6+4 x^5+21 x^4+40 x^3+8 x^2+23 x+24$
- $y^2=15 x^6+35 x^5+28 x^4+34 x^3+39 x^2+21 x+24$
- and 204 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{43}$.
Endomorphism algebra over $\F_{43}$| The endomorphism algebra of this simple isogeny class is 4.0.160973.1. |
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 |
|---|---|---|
| 2.43.ae_w | $2$ | (not in LMFDB) |