Invariants
| Base field: | $\F_{83}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 15 x + 133 x^{2} + 1245 x^{3} + 6889 x^{4}$ |
| Frobenius angles: | $\pm0.465917875925$, $\pm0.880279727230$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.1873627749.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $164$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $8283$ | $47734929$ | $327585087621$ | $2251654166448621$ | $15515638233676326768$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $99$ | $6931$ | $572913$ | $47444875$ | $3938938344$ | $326942013247$ | $27136048988763$ | $2252292264048259$ | $186940253718115029$ | $15516041197397272486$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 164 curves (of which all are hyperelliptic):
- $y^2=22 x^6+6 x^5+66 x^4+70 x^3+74 x^2+6 x+45$
- $y^2=56 x^6+5 x^5+x^4+43 x^3+9 x^2+23 x+70$
- $y^2=70 x^6+58 x^5+8 x^4+71 x^3+25 x^2+60 x+2$
- $y^2=38 x^6+58 x^5+19 x^4+14 x^3+41 x^2+48 x+55$
- $y^2=48 x^6+41 x^5+9 x^4+57 x^3+57 x^2+20 x+19$
- $y^2=30 x^6+23 x^5+11 x^4+51 x^3+27 x^2+43 x+25$
- $y^2=40 x^6+61 x^5+x^4+36 x^3+16 x^2+41 x+75$
- $y^2=81 x^6+72 x^5+8 x^4+3 x^3+15 x^2+70 x+18$
- $y^2=19 x^5+51 x^4+45 x^3+28 x^2+67 x+38$
- $y^2=58 x^6+58 x^5+22 x^4+17 x^3+12 x^2+76 x+36$
- $y^2=42 x^6+4 x^5+49 x^4+23 x^3+5 x^2+77 x+17$
- $y^2=18 x^6+77 x^5+9 x^4+72 x^3+43 x^2+46 x+63$
- $y^2=78 x^6+45 x^5+65 x^4+76 x^3+17 x^2+79 x+38$
- $y^2=3 x^6+5 x^5+31 x^4+66 x^3+36 x^2+43 x+40$
- $y^2=4 x^6+58 x^5+3 x^4+45 x^3+49 x^2+62 x+62$
- $y^2=12 x^6+54 x^5+15 x^4+69 x^3+26 x^2+39 x+49$
- $y^2=x^6+45 x^5+x^4+49 x^3+16 x^2+50 x+70$
- $y^2=44 x^6+50 x^5+41 x^4+21 x^3+58 x^2+68 x+8$
- $y^2=21 x^6+67 x^5+20 x^4+27 x^3+45 x^2+24 x+48$
- $y^2=7 x^6+33 x^5+50 x^4+10 x^3+34 x^2+60 x+81$
- and 144 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{83}$.
Endomorphism algebra over $\F_{83}$| The endomorphism algebra of this simple isogeny class is 4.0.1873627749.1. |
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 |
|---|---|---|
| 2.83.ap_fd | $2$ | (not in LMFDB) |