Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 12 x + 97 x^{2} )( 1 + 4 x + 97 x^{2} )$ |
| $1 - 8 x + 146 x^{2} - 776 x^{3} + 9409 x^{4}$ | |
| Frobenius angles: | $\pm0.291487575149$, $\pm0.565091650464$ |
| Angle rank: | $2$ (numerical) |
| Jacobians: | $384$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $8772$ | $90702480$ | $833577905412$ | $7837739164569600$ | $73743983094663083652$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $90$ | $9638$ | $913338$ | $88532734$ | $8587523130$ | $832971333926$ | $80798248841946$ | $7837433516683006$ | $760231060994552346$ | $73742412698215850918$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 384 curves (of which all are hyperelliptic):
- $y^2=95 x^6+77 x^5+74 x^4+2 x^3+92 x^2+89 x+5$
- $y^2=90 x^6+25 x^5+77 x^4+88 x^3+29 x^2+88 x+41$
- $y^2=70 x^6+35 x^5+11 x^4+50 x^3+61 x^2+82 x+33$
- $y^2=78 x^6+93 x^5+52 x^4+22 x^3+7 x^2+95 x+15$
- $y^2=96 x^6+54 x^5+21 x^4+93 x^3+27 x^2+14 x+55$
- $y^2=74 x^6+79 x^5+2 x^4+85 x^3+77 x^2+87 x+19$
- $y^2=52 x^6+22 x^5+23 x^4+15 x^3+30 x^2+19 x+23$
- $y^2=27 x^6+49 x^5+52 x^4+61 x^3+49 x^2+76 x+90$
- $y^2=76 x^6+62 x^5+72 x^4+38 x^3+32 x^2+80 x+81$
- $y^2=6 x^6+12 x^5+37 x^4+18 x^3+35 x^2+59 x+82$
- $y^2=61 x^6+41 x^5+53 x^4+20 x^3+76 x^2+13 x+44$
- $y^2=80 x^6+50 x^5+27 x^4+25 x^3+8 x^2+96 x+33$
- $y^2=16 x^6+25 x^5+90 x^4+39 x^3+96 x^2+20 x+74$
- $y^2=48 x^6+66 x^5+25 x^4+18 x^3+23 x^2+29 x+62$
- $y^2=71 x^6+95 x^5+88 x^4+96 x^3+72 x^2+67 x+29$
- $y^2=23 x^6+67 x^5+54 x^4+25 x^3+43 x^2+94 x+69$
- $y^2=x^6+78 x^5+93 x^4+88 x^3+78 x^2+38 x+84$
- $y^2=9 x^6+67 x^5+63 x^4+51 x^3+50 x^2+42 x+60$
- $y^2=47 x^6+81 x^5+84 x^4+89 x^3+17 x^2+5 x+60$
- $y^2=90 x^6+46 x^5+78 x^4+39 x^3+27 x^2+58 x+95$
- and 364 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.am $\times$ 1.97.e 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.
Twists
Below is a list of all twists of this isogeny class.
| Twist | Extension degree | Common base change |
|---|---|---|
| 2.97.aq_ji | $2$ | (not in LMFDB) |
| 2.97.i_fq | $2$ | (not in LMFDB) |
| 2.97.q_ji | $2$ | (not in LMFDB) |