Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 16 x^{2} + 9409 x^{4}$ |
| Frobenius angles: | $\pm0.263141107317$, $\pm0.736858892683$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{178}, \sqrt{-210})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $224$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $9426$ | $88849476$ | $832971557394$ | $7840720677048336$ | $73742412696383520786$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $98$ | $9442$ | $912674$ | $88566406$ | $8587340258$ | $832971109858$ | $80798284478114$ | $7837433259398398$ | $760231058654565218$ | $73742412703274215522$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 224 curves (of which all are hyperelliptic):
- $y^2=57 x^6+96 x^5+46 x^4+83 x^3+63 x^2+21 x+27$
- $y^2=91 x^6+92 x^5+36 x^4+27 x^3+24 x^2+8 x+38$
- $y^2=37 x^6+25 x^5+49 x^4+6 x^3+6 x^2+45 x+74$
- $y^2=88 x^6+28 x^5+51 x^4+30 x^3+30 x^2+31 x+79$
- $y^2=61 x^6+40 x^5+57 x^4+17 x^3+91 x^2+35 x+6$
- $y^2=14 x^6+6 x^5+91 x^4+85 x^3+67 x^2+78 x+30$
- $y^2=6 x^6+47 x^5+9 x^4+66 x^3+28 x^2+20 x+75$
- $y^2=30 x^6+41 x^5+45 x^4+39 x^3+43 x^2+3 x+84$
- $y^2=73 x^6+59 x^5+40 x^4+67 x^3+4 x^2+84 x+25$
- $y^2=74 x^6+4 x^5+6 x^4+44 x^3+20 x^2+32 x+28$
- $y^2=15 x^6+x^5+61 x^4+31 x^3+25 x^2+3 x+48$
- $y^2=75 x^6+5 x^5+14 x^4+58 x^3+28 x^2+15 x+46$
- $y^2=76 x^6+28 x^5+50 x^4+14 x^3+93 x^2+60 x+86$
- $y^2=89 x^6+43 x^5+56 x^4+70 x^3+77 x^2+9 x+42$
- $y^2=77 x^6+28 x^5+32 x^4+61 x^3+68 x^2+37 x+22$
- $y^2=94 x^6+43 x^5+63 x^4+14 x^3+49 x^2+88 x+13$
- $y^2=92 x^6+76 x^5+65 x^4+44 x^3+59 x^2+79 x+44$
- $y^2=72 x^6+89 x^5+34 x^4+26 x^3+4 x^2+7 x+26$
- $y^2=14 x^6+62 x^5+65 x^4+13 x^3+44 x^2+69 x+93$
- $y^2=70 x^6+19 x^5+34 x^4+65 x^3+26 x^2+54 x+77$
- and 204 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 \(\Q(\sqrt{178}, \sqrt{-210})\). |
| The base change of $A$ to $\F_{97^{2}}$ is 1.9409.q 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-9345}) \)$)$ |
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_aq | $4$ | (not in LMFDB) |