Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 12 x + 222 x^{2} - 1164 x^{3} + 9409 x^{4}$ |
| Frobenius angles: | $\pm0.352066851572$, $\pm0.448524145365$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.1874944.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $266$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $8456$ | $91392448$ | $835505438600$ | $7836577790024704$ | $73740100222763945096$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $86$ | $9710$ | $915446$ | $88519614$ | $8587070966$ | $832971323630$ | $80798298750038$ | $7837433694398974$ | $760231058427197462$ | $73742412687582397550$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 266 curves (of which all are hyperelliptic):
- $y^2=79 x^6+39 x^5+15 x^4+69 x^3+7 x^2+79 x+95$
- $y^2=63 x^6+45 x^5+55 x^4+51 x^3+48 x^2+60 x+96$
- $y^2=54 x^6+31 x^5+40 x^4+50 x^3+15 x^2+7 x+89$
- $y^2=79 x^6+43 x^5+60 x^4+6 x^3+73 x^2+48 x+78$
- $y^2=58 x^6+28 x^5+16 x^4+32 x^3+69 x^2+79 x+4$
- $y^2=26 x^6+41 x^5+28 x^4+9 x^3+93 x^2+85 x+69$
- $y^2=61 x^6+5 x^5+9 x^4+51 x^3+56 x^2+91 x+51$
- $y^2=23 x^6+49 x^5+25 x^4+15 x^3+79 x^2+8 x+19$
- $y^2=3 x^6+56 x^5+9 x^4+93 x^3+66 x^2+20 x+80$
- $y^2=10 x^6+30 x^5+71 x^4+45 x^3+77 x^2+39 x+53$
- $y^2=27 x^6+40 x^5+21 x^4+85 x^3+69 x^2+93 x+52$
- $y^2=52 x^6+55 x^5+73 x^4+86 x^3+85 x^2+45 x+82$
- $y^2=37 x^6+26 x^5+19 x^4+9 x^3+27 x^2+74 x+30$
- $y^2=43 x^6+58 x^5+85 x^4+63 x^3+79 x^2+35 x+69$
- $y^2=77 x^6+76 x^5+68 x^4+88 x^3+92 x^2+14 x+63$
- $y^2=19 x^6+24 x^5+64 x^4+4 x^3+73 x^2+15 x+85$
- $y^2=62 x^5+78 x^4+12 x^3+78 x^2+73 x+20$
- $y^2=81 x^6+51 x^5+60 x^4+71 x^3+85 x^2+6 x+28$
- $y^2=61 x^6+15 x^5+11 x^4+72 x^3+52 x^2+6 x+89$
- $y^2=8 x^6+3 x^5+58 x^4+42 x^3+96 x^2+11 x+41$
- and 246 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 4.0.1874944.1. |
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.m_io | $2$ | (not in LMFDB) |