Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 6 x - 14 x^{2} + 582 x^{3} + 9409 x^{4}$ |
| Frobenius angles: | $\pm0.296935264712$, $\pm0.856544068862$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-102 +6 \sqrt{217}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $248$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
This isogeny class is simple and 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $9984$ | $87939072$ | $834995236608$ | $7839201237663744$ | $73741485324400967424$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $104$ | $9346$ | $914888$ | $88549246$ | $8587232264$ | $832972246018$ | $80798249069096$ | $7837433685217534$ | $760231058489597864$ | $73742412710094049666$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 248 curves (of which all are hyperelliptic):
- $y^2=25 x^6+27 x^5+37 x^4+37 x^3+79 x^2+36 x+46$
- $y^2=48 x^6+80 x^5+7 x^4+5 x^3+65 x^2+4 x+74$
- $y^2=83 x^6+14 x^5+29 x^4+6 x^3+51 x^2+75 x+24$
- $y^2=7 x^6+50 x^5+66 x^4+68 x^3+7 x^2+65 x+91$
- $y^2=79 x^6+91 x^5+39 x^4+30 x^3+60 x^2+21 x+75$
- $y^2=41 x^6+17 x^5+54 x^4+4 x^3+62 x^2+27 x+42$
- $y^2=5 x^6+89 x^5+15 x^4+94 x^3+46 x^2+17 x+45$
- $y^2=12 x^6+21 x^5+40 x^4+67 x^3+18 x^2+57 x+65$
- $y^2=17 x^6+32 x^5+74 x^4+38 x^3+34 x^2+79 x+31$
- $y^2=73 x^6+39 x^5+15 x^4+50 x^3+90 x^2+3 x+89$
- $y^2=74 x^6+33 x^5+78 x^4+42 x^3+40 x^2+24 x+65$
- $y^2=86 x^6+32 x^5+15 x^4+6 x^3+89 x^2+35$
- $y^2=40 x^6+12 x^5+69 x^4+11 x^3+63 x^2+32 x$
- $y^2=13 x^6+23 x^5+61 x^4+32 x^3+21 x^2+x+33$
- $y^2=16 x^6+76 x^5+21 x^4+72 x^3+47 x^2+58 x+88$
- $y^2=23 x^6+85 x^5+42 x^4+42 x^3+62 x^2+92 x+74$
- $y^2=89 x^6+61 x^5+93 x^4+59 x^3+76 x^2+36 x+92$
- $y^2=56 x^6+90 x^5+71 x^4+49 x^3+36 x^2+5 x+75$
- $y^2=29 x^6+94 x^5+55 x^4+24 x^3+40 x^2+87 x+81$
- $y^2=90 x^6+9 x^5+96 x^4+64 x^3+35 x^2+75 x+6$
- and 228 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{97}$.
Endomorphism algebra over $\F_{97}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-102 +6 \sqrt{217}})\). |
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.ag_ao | $2$ | (not in LMFDB) |