Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 14 x + 171 x^{2} + 1358 x^{3} + 9409 x^{4}$ |
| Frobenius angles: | $\pm0.475975441990$, $\pm0.787926659627$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.3659328.2 |
| Galois group: | $D_{4}$ |
| Jacobians: | $216$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $3$ |
This isogeny class is simple and 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $10953$ | $89913177$ | $832641276816$ | $7837323163526889$ | $73740263256307116153$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $112$ | $9556$ | $912310$ | $88528036$ | $8587089952$ | $832974842878$ | $80798292666112$ | $7837433346095044$ | $760231059231560182$ | $73742412686049550516$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 216 curves (of which all are hyperelliptic):
- $y^2=3 x^6+43 x^5+79 x^4+21 x^3+27 x^2+42 x+17$
- $y^2=73 x^6+89 x^5+11 x^4+58 x^3+53 x^2+62 x+47$
- $y^2=81 x^6+9 x^5+59 x^4+40 x^3+96 x^2+55 x+84$
- $y^2=53 x^6+11 x^5+32 x^4+93 x^3+70 x^2+63 x+81$
- $y^2=4 x^6+70 x^5+65 x^4+45 x^3+5 x^2+15 x+58$
- $y^2=16 x^6+72 x^5+69 x^4+54 x^3+84 x^2+91 x+60$
- $y^2=47 x^6+10 x^5+45 x^4+54 x^3+42 x^2+5 x+86$
- $y^2=72 x^6+x^5+8 x^4+16 x^3+37 x^2+17 x+44$
- $y^2=91 x^6+34 x^5+32 x^4+89 x^3+83 x^2+26 x+1$
- $y^2=28 x^6+48 x^5+88 x^4+11 x^3+91 x^2+86 x+53$
- $y^2=39 x^6+50 x^5+51 x^4+42 x^3+43 x^2+87 x+31$
- $y^2=85 x^6+92 x^5+68 x^4+21 x^3+10 x^2+27 x+38$
- $y^2=51 x^6+15 x^5+3 x^4+9 x^3+92 x^2+11 x+40$
- $y^2=23 x^6+6 x^5+71 x^4+92 x^3+53 x^2+94 x+91$
- $y^2=96 x^6+x^4+81 x^3+55 x^2+14 x+11$
- $y^2=56 x^6+92 x^5+25 x^4+51 x^3+43 x^2+47 x+94$
- $y^2=75 x^6+5 x^5+50 x^4+54 x^3+14 x^2+61 x+80$
- $y^2=55 x^6+82 x^5+9 x^4+64 x^3+51 x^2+74 x+31$
- $y^2=83 x^6+86 x^5+90 x^4+70 x^3+7 x^2+87 x+70$
- $y^2=6 x^6+28 x^5+23 x^4+38 x^3+76 x^2+64 x+44$
- and 196 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{97}$.
Endomorphism algebra over $\F_{97}$| The endomorphism algebra of this simple isogeny class is 4.0.3659328.2. |
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.ao_gp | $2$ | (not in LMFDB) |