Invariants
| Base field: | $\F_{83}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 6 x + 158 x^{2} + 498 x^{3} + 6889 x^{4}$ |
| Frobenius angles: | $\pm0.480367433635$, $\pm0.627846968630$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.6720984.1 |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $7552$ | $49420288$ | $326292716416$ | $2251681626783744$ | $15516339005858780032$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $90$ | $7170$ | $570654$ | $47445454$ | $3939116250$ | $326940588690$ | $27136051972350$ | $2252292243218014$ | $186940254417717402$ | $15516041188581578850$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 224 curves (of which all are hyperelliptic):
- $y^2=81 x^6+41 x^5+12 x^4+31 x^3+75 x^2+34 x+82$
- $y^2=56 x^6+40 x^5+19 x^4+49 x^3+59 x^2+36 x$
- $y^2=4 x^6+23 x^5+28 x^4+26 x^3+44 x^2+22 x+8$
- $y^2=36 x^6+75 x^5+56 x^4+51 x^3+78 x^2+77 x+21$
- $y^2=28 x^6+5 x^5+33 x^4+18 x^3+17 x^2+48 x+4$
- $y^2=56 x^5+33 x^4+41 x^3+74 x^2+79 x+52$
- $y^2=10 x^6+73 x^5+37 x^4+69 x^3+28 x^2+48 x+79$
- $y^2=74 x^5+66 x^4+68 x^3+56 x^2+59 x+61$
- $y^2=10 x^6+36 x^5+4 x^4+2 x^3+16 x^2+11 x+52$
- $y^2=30 x^6+16 x^5+54 x^4+7 x^3+10 x^2+31 x+3$
- $y^2=16 x^6+62 x^5+7 x^4+7 x^3+43 x^2+41 x+53$
- $y^2=46 x^6+22 x^5+32 x^4+21 x^3+62 x^2+80 x+22$
- $y^2=17 x^6+80 x^5+4 x^4+43 x^3+51 x^2+75 x+6$
- $y^2=44 x^6+76 x^5+7 x^4+15 x^3+81 x^2+79 x+65$
- $y^2=35 x^6+11 x^5+69 x^4+13 x^3+18 x^2+37 x+40$
- $y^2=63 x^6+22 x^5+11 x^4+24 x^3+15 x^2+38 x+38$
- $y^2=35 x^5+30 x^4+49 x^3+39 x^2+67 x+9$
- $y^2=78 x^6+38 x^5+42 x^4+65 x^3+3 x^2+18 x+63$
- $y^2=71 x^6+47 x^5+43 x^4+31 x^3+56 x^2+38$
- $y^2=16 x^6+11 x^5+58 x^4+10 x^3+7 x^2+2 x+70$
- and 204 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 4.0.6720984.1. |
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.ag_gc | $2$ | (not in LMFDB) |