Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 8 x + 97 x^{2} )( 1 - 2 x + 97 x^{2} )$ |
| $1 - 10 x + 210 x^{2} - 970 x^{3} + 9409 x^{4}$ | |
| Frobenius angles: | $\pm0.366875061252$, $\pm0.467624736821$ |
| Angle rank: | $2$ (numerical) |
| Jacobians: | $406$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2, 3$ |
This isogeny class is not 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $8640$ | $91584000$ | $835156163520$ | $7836073574400000$ | $73740256869407371200$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $88$ | $9730$ | $915064$ | $88513918$ | $8587089208$ | $832972028290$ | $80798300041624$ | $7837433646147838$ | $760231058288725528$ | $73742412689839355650$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 406 curves (of which all are hyperelliptic):
- $y^2=68 x^6+20 x^5+50 x^4+82 x^3+52 x^2+33 x+13$
- $y^2=82 x^6+65 x^5+90 x^4+56 x^3+92 x^2+49 x+74$
- $y^2=39 x^6+13 x^5+8 x^4+61 x^3+31 x^2+12 x+80$
- $y^2=95 x^6+48 x^5+65 x^4+33 x^3+44 x^2+18 x+95$
- $y^2=67 x^6+26 x^5+58 x^4+80 x^3+67 x^2+70 x+82$
- $y^2=81 x^6+25 x^5+47 x^4+31 x^3+55 x^2+68 x+39$
- $y^2=12 x^6+16 x^5+19 x^4+28 x^3+61 x^2+39 x+82$
- $y^2=71 x^6+56 x^5+68 x^4+91 x^3+67 x^2+25 x+12$
- $y^2=94 x^6+35 x^5+18 x^4+46 x^3+44 x^2+36 x+69$
- $y^2=47 x^6+46 x^5+40 x^4+85 x^3+40 x^2+46 x+47$
- $y^2=37 x^6+80 x^5+71 x^4+13 x^3+96 x^2+55 x+50$
- $y^2=92 x^6+72 x^5+45 x^4+66 x^3+77 x^2+25 x+84$
- $y^2=28 x^6+24 x^5+42 x^4+13 x^3+94 x^2+48 x+30$
- $y^2=88 x^6+80 x^5+62 x^4+89 x^3+96 x^2+84 x+88$
- $y^2=55 x^6+84 x^5+90 x^4+50 x^3+13 x^2+11 x+74$
- $y^2=52 x^6+39 x^5+90 x^4+68 x^3+34 x^2+58 x+79$
- $y^2=15 x^6+23 x^5+51 x^4+96 x^3+92 x^2+83 x+88$
- $y^2=69 x^6+87 x^5+62 x^4+75 x^3+22 x^2+39 x+69$
- $y^2=37 x^6+48 x^5+34 x^4+60 x^3+29 x^2+52 x+20$
- $y^2=56 x^6+63 x^5+21 x^4+25 x^3+48 x^2+31 x+62$
- and 386 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{97}$.
Endomorphism algebra over $\F_{97}$| The isogeny class factors as 1.97.ai $\times$ 1.97.ac and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is: |
Base change
This is a primitive isogeny class.