Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 4 x + 97 x^{2} )( 1 + 8 x + 97 x^{2} )$ |
| $1 + 4 x + 162 x^{2} + 388 x^{3} + 9409 x^{4}$ | |
| Frobenius angles: | $\pm0.434908349536$, $\pm0.633124938748$ |
| Angle rank: | $2$ (numerical) |
| Jacobians: | $388$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $9964$ | $91469520$ | $832318358092$ | $7836464528179200$ | $73742435386161112204$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $102$ | $9718$ | $911958$ | $88518334$ | $8587342902$ | $832971147766$ | $80798298463110$ | $7837433779281406$ | $760231055957080326$ | $73742412672967123318$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 388 curves (of which all are hyperelliptic):
- $y^2=10 x^6+48 x^5+60 x^4+x^3+56 x^2+80 x+53$
- $y^2=78 x^6+83 x^5+51 x^4+x^3+57 x^2+5 x+30$
- $y^2=4 x^6+54 x^5+35 x^4+87 x^3+62 x^2+7 x+57$
- $y^2=9 x^6+4 x^5+50 x^4+15 x^3+63 x^2+68 x+69$
- $y^2=34 x^6+22 x^5+95 x^4+93 x^3+95 x^2+22 x+34$
- $y^2=20 x^6+84 x^5+20 x^4+23 x^3+48 x^2+72 x+5$
- $y^2=61 x^6+24 x^5+40 x^4+73 x^3+92 x^2+61 x+66$
- $y^2=24 x^6+57 x^5+47 x^4+18 x^3+73 x^2+78 x+86$
- $y^2=24 x^6+40 x^5+21 x^4+63 x^3+37 x^2+x+33$
- $y^2=94 x^6+9 x^5+41 x^4+70 x^3+59 x^2+90 x+10$
- $y^2=x^6+89 x^5+53 x^4+20 x^3+85 x^2+64 x+92$
- $y^2=41 x^6+17 x^5+83 x^4+9 x^3+46 x^2+28 x+25$
- $y^2=74 x^6+72 x^5+6 x^4+42 x^3+96 x^2+63 x+33$
- $y^2=85 x^6+57 x^5+47 x^4+82 x^3+47 x^2+57 x+85$
- $y^2=80 x^6+68 x^5+60 x^4+7 x^3+53 x^2+76 x+81$
- $y^2=71 x^6+96 x^5+3 x^4+13 x^3+3 x^2+96 x+71$
- $y^2=17 x^6+30 x^5+60 x^4+45 x^3+74 x^2+23 x+58$
- $y^2=74 x^6+42 x^5+75 x^4+25 x^3+7 x^2+17 x+78$
- $y^2=74 x^6+77 x^5+24 x^4+87 x^3+93 x^2+44 x+22$
- $y^2=75 x^6+32 x^5+5 x^4+64 x^3+84 x^2+15 x+10$
- and 368 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.ae $\times$ 1.97.i 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.