Invariants
| Base field: | $\F_{83}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 122 x^{2} + 6889 x^{4}$ |
| Frobenius angles: | $\pm0.118605205367$, $\pm0.881394794633$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{2}, \sqrt{-11})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $235$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $6768$ | $45805824$ | $326941078896$ | $2252187350470656$ | $15516041193776080368$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $84$ | $6646$ | $571788$ | $47456110$ | $3939040644$ | $326941784422$ | $27136050989628$ | $2252292419525854$ | $186940255267540404$ | $15516041200346307286$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 235 curves (of which all are hyperelliptic):
- $y^2=27 x^6+64 x^5+41 x^4+60 x^3+56 x^2+40 x+19$
- $y^2=62 x^6+29 x^5+18 x^4+17 x^3+33 x^2+12 x+17$
- $y^2=41 x^6+58 x^5+36 x^4+34 x^3+66 x^2+24 x+34$
- $y^2=22 x^6+30 x^5+28 x^4+71 x^3+16 x^2+39 x+9$
- $y^2=44 x^6+60 x^5+56 x^4+59 x^3+32 x^2+78 x+18$
- $y^2=23 x^6+15 x^5+56 x^4+68 x^3+23 x^2+15 x+31$
- $y^2=3 x^6+32 x^5+55 x^4+66 x^3+52 x^2+77 x+9$
- $y^2=6 x^6+64 x^5+27 x^4+49 x^3+21 x^2+71 x+18$
- $y^2=56 x^6+69 x^5+31 x^4+56 x^3+36 x^2+73 x+72$
- $y^2=29 x^6+55 x^5+62 x^4+29 x^3+72 x^2+63 x+61$
- $y^2=32 x^6+51 x^5+3 x^4+23 x^3+52 x^2+77 x+66$
- $y^2=33 x^6+69 x^5+13 x^4+42 x^3+4 x^2+22 x+17$
- $y^2=13 x^6+14 x^5+6 x^4+17 x^3+x^2+81 x+68$
- $y^2=28 x^5+47 x^4+80 x^3+68 x^2+21 x$
- $y^2=48 x^6+52 x^5+53 x^4+68 x^3+66 x^2+9 x+54$
- $y^2=13 x^6+21 x^5+23 x^4+53 x^3+49 x^2+18 x+25$
- $y^2=51 x^6+8 x^5+62 x^4+45 x^3+75 x^2+35 x+27$
- $y^2=19 x^6+16 x^5+41 x^4+7 x^3+67 x^2+70 x+54$
- $y^2=73 x^6+28 x^5+36 x^4+56 x^3+36 x^2+4 x+39$
- $y^2=63 x^6+56 x^5+72 x^4+29 x^3+72 x^2+8 x+78$
- and 215 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{83^{2}}$.
Endomorphism algebra over $\F_{83}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{2}, \sqrt{-11})\). |
| The base change of $A$ to $\F_{83^{2}}$ is 1.6889.aes 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-22}) \)$)$ |
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.a_es | $4$ | (not in LMFDB) |
| 2.83.ay_lc | $8$ | (not in LMFDB) |
| 2.83.y_lc | $8$ | (not in LMFDB) |