Invariants
| Base field: | $\F_{43}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 4 x + 66 x^{2} - 172 x^{3} + 1849 x^{4}$ |
| Frobenius angles: | $\pm0.323675367645$, $\pm0.570946805246$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.2930688.6 |
| Galois group: | $D_{4}$ |
| Jacobians: | $140$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $1740$ | $3640080$ | $6338181420$ | $11687860070400$ | $21613387056890700$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $40$ | $1966$ | $79720$ | $3418702$ | $147021400$ | $6321243454$ | $271816868440$ | $11688203613598$ | $502592695770760$ | $21611482349838286$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 140 curves (of which all are hyperelliptic):
- $y^2=17 x^6+10 x^5+8 x^4+24 x^3+38 x^2+2 x+27$
- $y^2=29 x^6+18 x^5+38 x^4+14 x^3+36 x^2+36 x+40$
- $y^2=33 x^6+10 x^5+2 x^4+38 x^3+26 x^2+25 x+5$
- $y^2=18 x^6+24 x^5+38 x^4+3 x^3+22 x^2+14 x+25$
- $y^2=13 x^6+6 x^5+14 x^4+17 x^3+20 x^2+40 x+32$
- $y^2=21 x^6+19 x^5+2 x^4+7 x^3+38 x^2+10 x+15$
- $y^2=31 x^6+36 x^5+28 x^4+10 x^3+3 x^2+5 x+36$
- $y^2=37 x^6+3 x^5+9 x^4+28 x^3+22 x^2+13 x+17$
- $y^2=11 x^6+41 x^5+19 x^4+22 x^3+7 x^2+12$
- $y^2=34 x^6+8 x^5+40 x^4+26 x^3+32 x^2+15 x+17$
- $y^2=39 x^6+3 x^5+20 x^4+32 x^3+30 x^2+39 x+21$
- $y^2=37 x^6+17 x^5+5 x^4+41 x^3+17 x^2+41 x+31$
- $y^2=36 x^6+22 x^5+3 x^4+35 x^3+21 x^2+34 x+7$
- $y^2=19 x^6+6 x^5+34 x^4+29 x^3+36 x^2+36$
- $y^2=40 x^6+7 x^5+21 x^4+8 x^3+26 x^2+25 x+38$
- $y^2=37 x^6+14 x^5+25 x^4+35 x^3+8 x^2+24 x+28$
- $y^2=x^6+19 x^5+24 x^4+32 x^3+39 x^2+13 x+42$
- $y^2=20 x^6+18 x^5+33 x^4+3 x^3+7 x^2+41 x+13$
- $y^2=15 x^6+13 x^5+29 x^4+16 x^3+27 x^2+27 x+14$
- $y^2=15 x^6+18 x^5+35 x^4+40 x^3+23 x^2+41 x+42$
- and 120 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 4.0.2930688.6. |
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.e_co | $2$ | (not in LMFDB) |