Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 25 x^{2} + 9409 x^{4}$ |
| Frobenius angles: | $\pm0.229433148540$, $\pm0.770566851460$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(i, \sqrt{219})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $308$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $9385$ | $88078225$ | $832972694980$ | $7840655328875625$ | $73742412679151978425$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $98$ | $9360$ | $912674$ | $88565668$ | $8587340258$ | $832973385030$ | $80798284478114$ | $7837433286523588$ | $760231058654565218$ | $73742412668811130800$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 308 curves (of which all are hyperelliptic):
- $y^2=23 x^6+77 x^5+5 x^4+17 x^3+16 x^2+28 x+25$
- $y^2=59 x^6+92 x^5+52 x^4+27 x^3+85 x^2+60 x+44$
- $y^2=69 x^6+16 x^5+33 x^4+78 x^3+74 x^2+32 x+89$
- $y^2=76 x^6+32 x^5+25 x^4+91 x^3+71 x^2+46 x+56$
- $y^2=89 x^6+63 x^5+28 x^4+67 x^3+64 x^2+36 x+86$
- $y^2=69 x^6+17 x^5+30 x^4+80 x^3+91 x^2+83 x+23$
- $y^2=54 x^6+85 x^5+53 x^4+12 x^3+67 x^2+27 x+18$
- $y^2=12 x^6+92 x^5+92 x^4+50 x^3+75 x^2+39 x+46$
- $y^2=19 x^6+46 x^5+83 x^4+58 x^3+48 x^2+37 x+91$
- $y^2=95 x^6+36 x^5+27 x^4+96 x^3+46 x^2+88 x+67$
- $y^2=36 x^6+65 x^5+19 x^4+15 x^3+12 x^2+3 x+64$
- $y^2=83 x^6+34 x^5+95 x^4+75 x^3+60 x^2+15 x+29$
- $y^2=69 x^6+27 x^5+83 x^4+79 x^3+43 x^2+23 x+93$
- $y^2=54 x^6+38 x^5+27 x^4+7 x^3+21 x^2+18 x+77$
- $y^2=42 x^6+9 x^5+22 x^4+2 x^3+46 x^2+80 x+18$
- $y^2=16 x^6+45 x^5+13 x^4+10 x^3+36 x^2+12 x+90$
- $y^2=91 x^6+85 x^5+15 x^4+29 x^3+17 x^2+33 x+37$
- $y^2=67 x^6+37 x^5+75 x^4+48 x^3+85 x^2+68 x+88$
- $y^2=7 x^6+23 x^5+70 x^4+59 x^3+63 x^2+2 x+50$
- $y^2=35 x^6+18 x^5+59 x^4+4 x^3+24 x^2+10 x+56$
- and 288 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{97^{2}}$.
Endomorphism algebra over $\F_{97}$| The endomorphism algebra of this simple isogeny class is \(\Q(i, \sqrt{219})\). |
| The base change of $A$ to $\F_{97^{2}}$ is 1.9409.az 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-219}) \)$)$ |
Base change
This is a primitive isogeny class.