Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 12 x + 145 x^{2} - 1164 x^{3} + 9409 x^{4}$ |
| Frobenius angles: | $\pm0.218928136679$, $\pm0.552261470013$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{-3}, \sqrt{85})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $492$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $8379$ | $89915049$ | $832973013936$ | $7837654658234121$ | $73745099091178848459$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $86$ | $9556$ | $912674$ | $88531780$ | $8587653086$ | $832974022942$ | $80798266241870$ | $7837433423558404$ | $760231058654565218$ | $73742412674047054036$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 492 curves (of which all are hyperelliptic):
- $y^2=30 x^6+6 x^5+82 x^4+19 x^2+44 x+70$
- $y^2=39 x^6+45 x^5+5 x^4+14 x^3+41 x^2+81 x+19$
- $y^2=55 x^6+65 x^5+86 x^4+58 x^3+50 x^2+78 x+67$
- $y^2=86 x^6+87 x^5+90 x^4+85 x^3+42 x^2+84 x+60$
- $y^2=60 x^6+83 x^5+76 x^4+11 x^3+x^2+88 x+2$
- $y^2=26 x^6+73 x^5+93 x^4+45 x^3+94 x^2+35 x+57$
- $y^2=20 x^6+83 x^5+83 x^4+67 x^3+39 x^2+57 x+64$
- $y^2=25 x^6+45 x^5+77 x^4+83 x^3+9 x^2+93 x+43$
- $y^2=28 x^6+45 x^5+14 x^4+30 x^3+57 x^2+48 x+91$
- $y^2=21 x^6+61 x^5+82 x^4+76 x^3+82 x^2+9 x+59$
- $y^2=7 x^6+94 x^5+47 x^4+96 x^3+41 x^2+20 x+79$
- $y^2=17 x^6+63 x^5+92 x^4+79 x^3+81 x^2+88 x+14$
- $y^2=2 x^6+90 x^5+31 x^4+78 x^3+95 x^2+29 x+50$
- $y^2=46 x^6+70 x^5+89 x^4+65 x^3+18 x^2+31 x+30$
- $y^2=90 x^6+7 x^5+22 x^4+41 x^3+83 x+94$
- $y^2=56 x^6+13 x^5+66 x^4+17 x^3+13 x^2+40 x+25$
- $y^2=4 x^6+32 x^5+95 x^4+35 x^3+75 x^2+94 x+16$
- $y^2=8 x^6+40 x^5+10 x^4+14 x^3+46 x^2+37 x+42$
- $y^2=22 x^6+84 x^5+25 x^4+64 x^3+80 x^2+76 x+9$
- $y^2=42 x^6+57 x^5+8 x^4+86 x^3+72 x^2+75 x+66$
- and 472 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{97^{6}}$.
Endomorphism algebra over $\F_{97}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-3}, \sqrt{85})\). |
| The base change of $A$ to $\F_{97^{6}}$ is 1.832972004929.cfkpy 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-255}) \)$)$ |
- Endomorphism algebra over $\F_{97^{2}}$
The base change of $A$ to $\F_{97^{2}}$ is the simple isogeny class 2.9409.fq_rpz and its endomorphism algebra is \(\Q(\sqrt{-3}, \sqrt{85})\). - Endomorphism algebra over $\F_{97^{3}}$
The base change of $A$ to $\F_{97^{3}}$ is the simple isogeny class 2.912673.a_cfkpy and its endomorphism algebra is \(\Q(\sqrt{-3}, \sqrt{85})\).
Base change
This is a primitive isogeny class.