Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 28 x^{2} + 9409 x^{4}$ |
| Frobenius angles: | $\pm0.273051324824$, $\pm0.726948675176$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{166}, \sqrt{-222})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $264$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $9438$ | $89075844$ | $832971236526$ | $7840627170803856$ | $73742412700871403918$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $98$ | $9466$ | $912674$ | $88565350$ | $8587340258$ | $832970468122$ | $80798284478114$ | $7837433298043774$ | $760231058654565218$ | $73742412712249981786$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 264 curves (of which all are hyperelliptic):
- $y^2=8 x^6+72 x^5+54 x^4+52 x^3+83 x^2+94 x+83$
- $y^2=40 x^6+69 x^5+76 x^4+66 x^3+27 x^2+82 x+27$
- $y^2=25 x^6+79 x^5+38 x^4+44 x^3+60 x^2+2 x+39$
- $y^2=28 x^6+7 x^5+93 x^4+26 x^3+9 x^2+10 x+1$
- $y^2=88 x^6+62 x^5+11 x^4+58 x^3+54 x^2+7 x+4$
- $y^2=52 x^6+19 x^5+55 x^4+96 x^3+76 x^2+35 x+20$
- $y^2=96 x^6+73 x^5+82 x^4+9 x^3+70 x^2+23 x+74$
- $y^2=92 x^6+74 x^5+22 x^4+45 x^3+59 x^2+18 x+79$
- $y^2=13 x^6+54 x^5+69 x^4+25 x^3+20 x^2+56 x+5$
- $y^2=65 x^6+76 x^5+54 x^4+28 x^3+3 x^2+86 x+25$
- $y^2=3 x^6+61 x^5+67 x^4+43 x^3+21 x^2+38 x+40$
- $y^2=15 x^6+14 x^5+44 x^4+21 x^3+8 x^2+93 x+6$
- $y^2=77 x^6+64 x^5+74 x^4+94 x^3+23 x^2+12 x+12$
- $y^2=94 x^6+29 x^5+79 x^4+82 x^3+18 x^2+60 x+60$
- $y^2=13 x^6+26 x^5+31 x^4+85 x^3+33 x^2+29 x+53$
- $y^2=65 x^6+33 x^5+58 x^4+37 x^3+68 x^2+48 x+71$
- $y^2=15 x^6+74 x^5+78 x^4+93 x^3+62 x^2+57 x+58$
- $y^2=75 x^6+79 x^5+2 x^4+77 x^3+19 x^2+91 x+96$
- $y^2=46 x^6+36 x^5+78 x^4+88 x^3+95 x+11$
- $y^2=36 x^6+83 x^5+2 x^4+52 x^3+87 x+55$
- and 244 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 \(\Q(\sqrt{166}, \sqrt{-222})\). |
| The base change of $A$ to $\F_{97^{2}}$ is 1.9409.bc 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-9213}) \)$)$ |
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 |
|---|---|---|
| 2.97.a_abc | $4$ | (not in LMFDB) |