Invariants
| Base field: | $\F_{83}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 15 x + 83 x^{2} )( 1 + 15 x + 83 x^{2} )$ |
| $1 - 59 x^{2} + 6889 x^{4}$ | |
| Frobenius angles: | $\pm0.192168636682$, $\pm0.807831363318$ |
| Angle rank: | $1$ (numerical) |
| Jacobians: | $354$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $3$ |
This isogeny class is not 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $6831$ | $46662561$ | $326941387344$ | $2253269789767161$ | $15516041179565004111$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $84$ | $6772$ | $571788$ | $47478916$ | $3939040644$ | $326942401318$ | $27136050989628$ | $2252292209915908$ | $186940255267540404$ | $15516041171924154772$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 354 curves (of which all are hyperelliptic):
- $y^2=21 x^6+61 x^5+39 x^4+65 x^3+21 x^2+63$
- $y^2=42 x^6+39 x^5+78 x^4+47 x^3+42 x^2+43$
- $y^2=22 x^6+53 x^5+19 x^4+59 x^3+8 x^2+50 x+17$
- $y^2=44 x^6+23 x^5+38 x^4+35 x^3+16 x^2+17 x+34$
- $y^2=82 x^6+4 x^5+9 x^4+2 x^3+68 x^2+45 x+19$
- $y^2=81 x^6+8 x^5+18 x^4+4 x^3+53 x^2+7 x+38$
- $y^2=31 x^6+31 x^5+66 x^4+37 x^3+71 x^2+19 x+58$
- $y^2=62 x^6+62 x^5+49 x^4+74 x^3+59 x^2+38 x+33$
- $y^2=66 x^6+14 x^5+29 x^4+16 x^3+64 x^2+68 x+73$
- $y^2=49 x^6+28 x^5+58 x^4+32 x^3+45 x^2+53 x+63$
- $y^2=25 x^6+42 x^5+20 x^4+60 x^3+25 x^2+76 x+54$
- $y^2=50 x^6+x^5+40 x^4+37 x^3+50 x^2+69 x+25$
- $y^2=7 x^6+24 x^5+62 x^4+8 x^3+5 x^2+55 x+25$
- $y^2=14 x^6+48 x^5+41 x^4+16 x^3+10 x^2+27 x+50$
- $y^2=27 x^6+3 x^5+53 x^4+7 x^3+40 x^2+55 x+58$
- $y^2=54 x^6+6 x^5+23 x^4+14 x^3+80 x^2+27 x+33$
- $y^2=47 x^6+39 x^5+27 x^4+63 x^3+55 x^2+72 x+37$
- $y^2=15 x^6+44 x^5+16 x^4+13 x^3+8 x^2+11 x+33$
- $y^2=20 x^6+29 x^5+70 x^4+59 x^3+55 x^2+23 x+25$
- $y^2=40 x^6+58 x^5+57 x^4+35 x^3+27 x^2+46 x+50$
- and 334 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{83^{2}}$.
Endomorphism algebra over $\F_{83}$| The isogeny class factors as 1.83.ap $\times$ 1.83.p and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is: |
| The base change of $A$ to $\F_{83^{2}}$ is 1.6889.ach 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-107}) \)$)$ |
Base change
This is a primitive isogeny class.