Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 14 x + 97 x^{2} )( 1 - 5 x + 97 x^{2} )$ |
| $1 - 19 x + 264 x^{2} - 1843 x^{3} + 9409 x^{4}$ | |
| Frobenius angles: | $\pm0.248359198326$, $\pm0.418307468341$ |
| Angle rank: | $1$ (numerical) |
| Jacobians: | $250$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $7812$ | $90119232$ | $835403312016$ | $7838236637247744$ | $73742040516044313252$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $79$ | $9577$ | $915334$ | $88538353$ | $8587296919$ | $832972117822$ | $80798289754471$ | $7837433499601441$ | $760231056076708678$ | $73742412674196414457$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 250 curves (of which all are hyperelliptic):
- $y^2=x^6+88 x^5+39 x^4+61 x^3+45 x^2+12 x+72$
- $y^2=60 x^6+12 x^5+56 x^4+36 x^3+73 x^2+71 x+88$
- $y^2=33 x^6+58 x^5+85 x^4+29 x^3+80 x^2+57 x+74$
- $y^2=93 x^6+42 x^5+84 x^4+63 x^3+13 x^2+15 x+64$
- $y^2=27 x^6+14 x^5+94 x^4+3 x^3+54 x^2+51 x+46$
- $y^2=30 x^6+91 x^5+20 x^4+x^3+x^2+90 x+13$
- $y^2=4 x^6+94 x^5+28 x^4+57 x^3+41 x^2+39 x+70$
- $y^2=58 x^6+83 x^5+54 x^4+20 x^3+57 x^2+90 x+12$
- $y^2=51 x^6+94 x^5+6 x^4+65 x^3+37 x^2+84 x+84$
- $y^2=30 x^6+29 x^5+47 x^4+88 x^3+52 x^2+96 x+5$
- $y^2=18 x^6+4 x^5+5 x^4+20 x^3+11 x^2+89 x+30$
- $y^2=46 x^6+66 x^5+24 x^4+73 x^3+47 x^2+40 x+90$
- $y^2=23 x^6+66 x^5+47 x^4+5 x^3+64 x^2+8 x+59$
- $y^2=49 x^6+29 x^5+67 x^4+49 x^3+18 x^2+33 x+80$
- $y^2=42 x^6+60 x^5+7 x^4+21 x^3+60 x^2+66 x+53$
- $y^2=26 x^6+29 x^5+20 x^4+5 x^3+65 x^2+41 x+84$
- $y^2=87 x^6+93 x^5+66 x^4+64 x^3+94 x^2+72 x+69$
- $y^2=92 x^6+84 x^5+74 x^4+80 x^3+71 x^2+20 x+64$
- $y^2=24 x^6+23 x^5+92 x^4+43 x^3+50 x^2+29 x+76$
- $y^2=69 x^6+69 x^5+91 x^4+79 x^3+15 x^2+53 x+80$
- and 230 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{97^{3}}$.
Endomorphism algebra over $\F_{97}$| The isogeny class factors as 1.97.ao $\times$ 1.97.af 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 $\F_{97^{3}}$ is 1.912673.bze 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-3}) \)$)$ |
Base change
This is a primitive isogeny class.