Invariants
| Base field: | $\F_{41}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 4 x + 14 x^{2} - 164 x^{3} + 1681 x^{4}$ |
| Frobenius angles: | $\pm0.194660287866$, $\pm0.669029747546$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.105472.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $126$ |
| Isomorphism classes: | 294 |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $1528$ | $2848192$ | $4723428472$ | $7997221854208$ | $13426311081824248$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $38$ | $1694$ | $68534$ | $2830110$ | $115887718$ | $4750085630$ | $194755123510$ | $7984926747838$ | $327381872543270$ | $13422659212113374$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 126 curves (of which all are hyperelliptic):
- $y^2=21 x^6+29 x^5+17 x^4+37 x^2+32 x+15$
- $y^2=10 x^6+17 x^5+26 x^4+11 x^3+4 x^2+13 x+20$
- $y^2=4 x^6+38 x^5+11 x^4+35 x^3+14 x^2+35 x+9$
- $y^2=27 x^6+17 x^5+14 x^4+20 x^3+27 x^2+2 x+4$
- $y^2=22 x^6+36 x^5+27 x^4+3 x^3+39 x^2+39 x+16$
- $y^2=7 x^6+33 x^5+39 x^4+16 x^3+14 x^2+34 x+18$
- $y^2=4 x^6+15 x^5+3 x^4+18 x^3+2 x^2+7 x+11$
- $y^2=2 x^6+4 x^5+7 x^4+2 x^3+26 x^2+29 x+34$
- $y^2=40 x^6+34 x^5+18 x^4+7 x^3+21 x^2+38 x$
- $y^2=17 x^6+9 x^5+9 x^4+30 x^3+40 x^2+13 x+8$
- $y^2=2 x^6+22 x^5+11 x^4+33 x^3+25 x^2+5 x+31$
- $y^2=12 x^6+38 x^5+39 x^4+29 x^3+6 x^2+10 x+16$
- $y^2=28 x^6+11 x^5+22 x^4+31 x^3+36 x^2+5 x+19$
- $y^2=5 x^6+5 x^5+37 x^4+37 x^3+27 x^2+6 x$
- $y^2=9 x^6+39 x^5+32 x^4+26 x^3+34 x^2+19 x+26$
- $y^2=9 x^6+36 x^5+2 x^4+3 x^3+19 x^2+3 x+36$
- $y^2=29 x^6+37 x^5+20 x^4+29 x^3+31 x^2+32 x+17$
- $y^2=33 x^6+33 x^5+33 x^4+17 x^3+7 x^2+23 x+29$
- $y^2=31 x^6+4 x^5+2 x^4+30 x^3+x^2+8 x+32$
- $y^2=40 x^6+28 x^5+4 x^4+15 x^3+6 x^2+7 x+34$
- and 106 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{41}$.
Endomorphism algebra over $\F_{41}$| The endomorphism algebra of this simple isogeny class is 4.0.105472.1. |
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 |
|---|---|---|
| 2.41.e_o | $2$ | (not in LMFDB) |