Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + x - 87 x^{2} + 97 x^{3} + 9409 x^{4}$ |
| Frobenius angles: | $\pm0.190605430042$, $\pm0.840311227890$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.276525.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $336$ |
| Cyclic group of points: | yes |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $9421$ | $86908725$ | $833478592669$ | $7839360366913125$ | $73742703927510470656$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $99$ | $9235$ | $913227$ | $88551043$ | $8587374174$ | $832975457155$ | $80798276662587$ | $7837433694496963$ | $760231057220512899$ | $73742412667913439550$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 336 curves (of which all are hyperelliptic):
- $y^2=68 x^6+68 x^5+37 x^4+90 x^3+57 x^2+x+21$
- $y^2=18 x^6+9 x^5+21 x^4+8 x^3+13 x^2+81 x+29$
- $y^2=18 x^6+48 x^5+9 x^4+51 x^3+55 x^2+35 x+56$
- $y^2=82 x^6+52 x^5+83 x^4+2 x^3+74 x^2+16 x+95$
- $y^2=3 x^6+92 x^5+39 x^4+89 x^3+77 x^2+60 x+17$
- $y^2=96 x^6+57 x^5+55 x^4+56 x^3+55 x^2+2 x+14$
- $y^2=57 x^6+13 x^5+83 x^4+64 x^3+36 x^2+28 x+62$
- $y^2=20 x^6+54 x^5+9 x^4+95 x^3+55 x^2+95 x+87$
- $y^2=5 x^6+82 x^5+60 x^4+42 x^3+85 x^2+87 x+64$
- $y^2=19 x^6+31 x^5+84 x^4+85 x^3+37 x^2+76 x+41$
- $y^2=89 x^6+59 x^5+78 x^4+3 x^3+19 x^2+3 x+36$
- $y^2=41 x^6+76 x^5+12 x^4+92 x^3+9 x^2+13 x+26$
- $y^2=x^6+81 x^5+57 x^4+87 x^3+40 x^2+64 x+3$
- $y^2=76 x^6+86 x^5+95 x^4+43 x^3+73 x^2+31 x+71$
- $y^2=31 x^6+67 x^5+90 x^4+35 x^3+73 x^2+41 x+41$
- $y^2=87 x^6+13 x^5+93 x^4+23 x^3+36 x^2+26 x+26$
- $y^2=24 x^6+83 x^5+85 x^4+6 x^3+31 x^2+76 x+32$
- $y^2=30 x^6+31 x^5+52 x^4+31 x^3+16 x^2+55 x+2$
- $y^2=79 x^6+78 x^5+74 x^4+28 x^3+41 x^2+17 x+36$
- $y^2=22 x^6+63 x^5+93 x^4+45 x^3+42 x^2+76 x+14$
- and 316 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 4.0.276525.1. |
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.ab_adj | $2$ | (not in LMFDB) |