Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 + x + 97 x^{2} )( 1 + 17 x + 97 x^{2} )$ |
| $1 + 18 x + 211 x^{2} + 1746 x^{3} + 9409 x^{4}$ | |
| Frobenius angles: | $\pm0.516166685643$, $\pm0.831445154542$ |
| Angle rank: | $2$ (numerical) |
| Jacobians: | $360$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $11385$ | $89451945$ | $832678133760$ | $7836668875002825$ | $73741411226273974425$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $116$ | $9508$ | $912350$ | $88520644$ | $8587223636$ | $832975570366$ | $80798263037972$ | $7837433512889476$ | $760231059517255070$ | $73742412695045568868$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 360 curves (of which all are hyperelliptic):
- $y^2=54 x^6+91 x^5+11 x^4+2 x^3+23 x^2+48 x+67$
- $y^2=92 x^6+75 x^5+84 x^4+18 x^3+90 x^2+88 x+79$
- $y^2=19 x^6+59 x^5+63 x^4+20 x^3+72 x^2+12 x+48$
- $y^2=49 x^6+71 x^5+25 x^4+9 x^3+53 x^2+63 x+18$
- $y^2=48 x^6+35 x^5+5 x^4+82 x^3+34 x^2+84 x+56$
- $y^2=20 x^6+4 x^5+87 x^4+92 x^3+71 x^2+93 x+45$
- $y^2=42 x^6+53 x^5+45 x^4+44 x^3+58 x^2+20 x+93$
- $y^2=91 x^6+83 x^5+55 x^4+87 x^3+52 x^2+52 x+17$
- $y^2=28 x^6+20 x^5+34 x^4+74 x^3+5 x^2+53 x+31$
- $y^2=49 x^6+46 x^5+69 x^4+67 x^3+x^2+88 x+72$
- $y^2=11 x^6+49 x^5+6 x^4+89 x^3+88 x^2+47 x+10$
- $y^2=94 x^6+41 x^5+5 x^4+5 x^3+80 x^2+47 x+33$
- $y^2=85 x^6+60 x^5+71 x^4+44 x^3+71 x^2+38 x+60$
- $y^2=86 x^6+20 x^5+18 x^4+32 x^3+16 x^2+9 x+83$
- $y^2=41 x^6+56 x^5+83 x^4+5 x^3+90 x^2+93 x+75$
- $y^2=21 x^6+93 x^5+21 x^4+5 x^3+24 x^2+4 x+22$
- $y^2=42 x^6+2 x^5+36 x^4+8 x^3+52 x^2+27 x+49$
- $y^2=23 x^6+75 x^5+48 x^4+49 x^3+26 x^2+89 x+79$
- $y^2=66 x^6+83 x^5+65 x^4+8 x^3+39 x^2+6 x+82$
- $y^2=40 x^6+69 x^5+93 x^4+74 x^3+33 x^2+4 x+54$
- and 340 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.b $\times$ 1.97.r 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.as_id | $2$ | (not in LMFDB) |
| 2.97.aq_gv | $2$ | (not in LMFDB) |
| 2.97.q_gv | $2$ | (not in LMFDB) |