Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 13 x + 72 x^{2} - 1261 x^{3} + 9409 x^{4}$ |
| Frobenius angles: | $\pm0.0627664818732$, $\pm0.603900184793$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{-3}, \sqrt{73})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $240$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $8208$ | $88285248$ | $830081343744$ | $7835823223605504$ | $73743122577396426768$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $85$ | $9385$ | $909502$ | $88511089$ | $8587422925$ | $832970624830$ | $80798267488765$ | $7837433748303649$ | $760231059360725374$ | $73742412679151978425$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 240 curves (of which all are hyperelliptic):
- $y^2=78 x^6+79 x^5+9 x^4+91 x^3+44 x^2+66 x+96$
- $y^2=91 x^6+69 x^5+75 x^4+77 x^3+x^2+31 x+36$
- $y^2=48 x^6+32 x^5+52 x^4+22 x^3+77 x^2+63 x+46$
- $y^2=90 x^6+54 x^5+20 x^4+11 x^3+40 x^2+44 x+68$
- $y^2=75 x^6+93 x^5+71 x^4+82 x^3+69 x^2+24 x+62$
- $y^2=65 x^6+86 x^5+77 x^4+72 x^3+51 x^2+59 x+49$
- $y^2=95 x^6+85 x^5+47 x^4+17 x^3+61 x^2+55 x+79$
- $y^2=15 x^6+31 x^5+15 x^4+37 x^3+13 x^2+4 x+83$
- $y^2=18 x^6+68 x^5+71 x^4+2 x^3+65 x^2+69 x+44$
- $y^2=2 x^6+44 x^5+73 x^2+49 x+7$
- $y^2=36 x^6+52 x^5+5 x^4+15 x^3+32 x^2+96 x+9$
- $y^2=62 x^6+28 x^5+69 x^4+29 x^3+72 x^2+x+23$
- $y^2=93 x^6+61 x^5+10 x^4+24 x^3+94 x^2+50 x+19$
- $y^2=27 x^6+11 x^5+63 x^4+23 x^3+34 x^2+3 x+10$
- $y^2=31 x^6+12 x^5+51 x^4+71 x^3+15 x^2+12 x+17$
- $y^2=95 x^6+9 x^5+32 x^4+63 x^3+23 x^2+71 x+85$
- $y^2=57 x^6+66 x^5+85 x^4+79 x^3+33 x^2+9 x+84$
- $y^2=3 x^6+19 x^5+62 x^4+30 x^3+53 x^2+96 x+69$
- $y^2=9 x^6+75 x^5+13 x^4+36 x^3+21 x^2+22 x+35$
- $y^2=2 x^6+47 x^5+87 x^4+65 x^3+61 x^2+26 x+32$
- and 220 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{97^{3}}$.
Endomorphism algebra over $\F_{97}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-3}, \sqrt{73})\). |
| The base change of $A$ to $\F_{97^{3}}$ is 1.912673.acja 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-219}) \)$)$ |
Base change
This is a primitive isogeny class.