Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 54 x^{2} + 9409 x^{4}$ |
| Frobenius angles: | $\pm0.294893841553$, $\pm0.705106158447$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{35}, \sqrt{-62})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $424$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $9464$ | $89567296$ | $832970638136$ | $7840249609593856$ | $73742412706447003064$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $98$ | $9518$ | $912674$ | $88561086$ | $8587340258$ | $832969271342$ | $80798284478114$ | $7837433442746878$ | $760231058654565218$ | $73742412723401180078$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 424 curves (of which all are hyperelliptic):
- $y^2=21 x^6+86 x^5+23 x^4+88 x^3+25 x^2+59 x+84$
- $y^2=8 x^6+42 x^5+18 x^4+52 x^3+28 x^2+4 x+32$
- $y^2=12 x^6+27 x^5+13 x^4+6 x^3+23 x^2+38 x$
- $y^2=60 x^6+38 x^5+65 x^4+30 x^3+18 x^2+93 x$
- $y^2=34 x^6+36 x^5+91 x^4+63 x^3+41 x^2+86 x+71$
- $y^2=73 x^6+83 x^5+67 x^4+24 x^3+11 x^2+42 x+64$
- $y^2=68 x^6+3 x^5+67 x^4+41 x^3+43 x^2+81 x+53$
- $y^2=49 x^6+15 x^5+44 x^4+11 x^3+21 x^2+17 x+71$
- $y^2=73 x^6+89 x^5+75 x^4+68 x^3+66 x^2+91 x+65$
- $y^2=74 x^6+57 x^5+84 x^4+49 x^3+39 x^2+67 x+34$
- $y^2=87 x^6+41 x^5+46 x^4+28 x^3+62 x^2+85 x+4$
- $y^2=47 x^6+11 x^5+36 x^4+43 x^3+19 x^2+37 x+20$
- $y^2=9 x^6+17 x^5+2 x^4+84 x^3+25 x^2+10 x+75$
- $y^2=45 x^6+85 x^5+10 x^4+32 x^3+28 x^2+50 x+84$
- $y^2=2 x^6+71 x^5+24 x^4+40 x^3+3 x^2+30 x+48$
- $y^2=10 x^6+64 x^5+23 x^4+6 x^3+15 x^2+53 x+46$
- $y^2=75 x^6+51 x^5+60 x^4+40 x^3+87 x^2+65 x+5$
- $y^2=84 x^6+61 x^5+9 x^4+6 x^3+47 x^2+34 x+25$
- $y^2=59 x^6+19 x^5+29 x^4+54 x^3+61 x^2+63 x+72$
- $y^2=4 x^6+95 x^5+48 x^4+76 x^3+14 x^2+24 x+69$
- and 404 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 \(\Q(\sqrt{35}, \sqrt{-62})\). |
| The base change of $A$ to $\F_{97^{2}}$ is 1.9409.cc 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-2170}) \)$)$ |
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_acc | $4$ | (not in LMFDB) |