Invariants
| Base field: | $\F_{83}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 6 x + 158 x^{2} - 498 x^{3} + 6889 x^{4}$ |
| Frobenius angles: | $\pm0.372153031370$, $\pm0.519632566365$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $6544$ | $49420288$ | $327589531600$ | $2251681626783744$ | $15515743375644919504$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $78$ | $7170$ | $572922$ | $47445454$ | $3938965038$ | $326940588690$ | $27136050006906$ | $2252292243218014$ | $186940256117363406$ | $15516041188581578850$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 224 curves (of which all are hyperelliptic):
- $y^2=82 x^6+62 x^5+6 x^4+57 x^3+79 x^2+17 x+41$
- $y^2=29 x^6+80 x^5+38 x^4+15 x^3+35 x^2+72 x$
- $y^2=8 x^6+46 x^5+56 x^4+52 x^3+5 x^2+44 x+16$
- $y^2=72 x^6+67 x^5+29 x^4+19 x^3+73 x^2+71 x+42$
- $y^2=56 x^6+10 x^5+66 x^4+36 x^3+34 x^2+13 x+8$
- $y^2=28 x^5+58 x^4+62 x^3+37 x^2+81 x+26$
- $y^2=20 x^6+63 x^5+74 x^4+55 x^3+56 x^2+13 x+75$
- $y^2=37 x^5+33 x^4+34 x^3+28 x^2+71 x+72$
- $y^2=20 x^6+72 x^5+8 x^4+4 x^3+32 x^2+22 x+21$
- $y^2=60 x^6+32 x^5+25 x^4+14 x^3+20 x^2+62 x+6$
- $y^2=8 x^6+31 x^5+45 x^4+45 x^3+63 x^2+62 x+68$
- $y^2=23 x^6+11 x^5+16 x^4+52 x^3+31 x^2+40 x+11$
- $y^2=50 x^6+40 x^5+2 x^4+63 x^3+67 x^2+79 x+3$
- $y^2=5 x^6+69 x^5+14 x^4+30 x^3+79 x^2+75 x+47$
- $y^2=70 x^6+22 x^5+55 x^4+26 x^3+36 x^2+74 x+80$
- $y^2=73 x^6+11 x^5+47 x^4+12 x^3+49 x^2+19 x+19$
- $y^2=59 x^5+15 x^4+66 x^3+61 x^2+75 x+46$
- $y^2=73 x^6+76 x^5+x^4+47 x^3+6 x^2+36 x+43$
- $y^2=59 x^6+11 x^5+3 x^4+62 x^3+29 x^2+76$
- $y^2=8 x^6+47 x^5+29 x^4+5 x^3+45 x^2+x+35$
- 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.g_gc | $2$ | (not in LMFDB) |