Invariants
| Base field: | $\F_{83}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 16 x + 173 x^{2} + 1328 x^{3} + 6889 x^{4}$ |
| Frobenius angles: | $\pm0.507864978640$, $\pm0.825468354694$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{-3}, \sqrt{-19})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $232$ |
| Isomorphism classes: | 120 |
| Cyclic group of points: | yes |
This isogeny class is simple but not 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $8407$ | $48079633$ | $326813448976$ | $2252022748568089$ | $15515646722009380807$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $100$ | $6980$ | $571564$ | $47452644$ | $3938940500$ | $326942635430$ | $27136041205100$ | $2252292169462084$ | $186940255648971412$ | $15516041189356592900$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 232 curves (of which all are hyperelliptic):
- $y^2=63 x^6+60 x^5+29 x^4+49 x^3+11 x^2+64 x+4$
- $y^2=12 x^6+54 x^5+77 x^4+9 x^3+73 x^2+29 x+10$
- $y^2=70 x^6+21 x^5+76 x^4+53 x^3+48 x^2+11 x+37$
- $y^2=28 x^6+35 x^5+78 x^4+12 x^3+17 x^2+64 x+53$
- $y^2=11 x^6+56 x^5+82 x^4+55 x^3+28 x^2+8 x+33$
- $y^2=77 x^6+3 x^5+42 x^4+11 x^3+35 x^2+76 x+79$
- $y^2=37 x^6+28 x^5+32 x^4+7 x^3+14 x^2+45 x+30$
- $y^2=64 x^6+31 x^5+50 x^4+8 x^3+24 x^2+56 x+35$
- $y^2=46 x^6+49 x^5+22 x^4+35 x^3+51 x^2+2 x+20$
- $y^2=53 x^6+17 x^5+6 x^4+19 x^3+61 x^2+82 x+63$
- $y^2=68 x^6+22 x^5+40 x^4+73 x^3+61 x^2+82 x+72$
- $y^2=78 x^6+54 x^5+66 x^4+19 x^3+58 x^2+44 x+43$
- $y^2=74 x^6+58 x^5+31 x^4+70 x^3+x^2+32 x+50$
- $y^2=25 x^6+25 x^5+68 x^4+26 x^3+32 x^2+47 x+49$
- $y^2=63 x^6+44 x^5+24 x^4+58 x^3+58 x^2+34 x+32$
- $y^2=35 x^6+49 x^5+52 x^3+78 x^2+80 x+5$
- $y^2=80 x^6+22 x^5+18 x^4+56 x^3+40 x^2+46 x+56$
- $y^2=22 x^6+59 x^5+9 x^4+3 x^3+11 x^2+72 x+78$
- $y^2=78 x^6+63 x^5+20 x^4+14 x^3+61 x^2+58 x+4$
- $y^2=64 x^6+39 x^5+44 x^4+49 x^3+36 x^2+59 x+11$
- and 212 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{83^{3}}$.
Endomorphism algebra over $\F_{83}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-3}, \sqrt{-19})\). |
| The base change of $A$ to $\F_{83^{3}}$ is 1.571787.aei 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-19}) \)$)$ |
Base change
This is a primitive isogeny class.