Invariants
| Base field: | $\F_{67}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 16 x + 170 x^{2} - 1072 x^{3} + 4489 x^{4}$ |
| Frobenius angles: | $\pm0.198429198698$, $\pm0.447093057593$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.291648.2 |
| Galois group: | $D_{4}$ |
| Jacobians: | $124$ |
| Isomorphism classes: | 156 |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $3572$ | $20531856$ | $90714201236$ | $406069521186816$ | $1822863704064236852$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $52$ | $4574$ | $301612$ | $20151214$ | $1350144292$ | $90459205454$ | $6060717808540$ | $406067657002078$ | $27206533809318676$ | $1822837801608542654$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 124 curves (of which all are hyperelliptic):
- $y^2=15 x^6+8 x^5+13 x^4+28 x^3+41 x^2+44 x+63$
- $y^2=5 x^6+50 x^5+49 x^4+39 x^3+17 x^2+53 x+7$
- $y^2=60 x^6+58 x^5+29 x^4+58 x^3+24 x^2+41 x+57$
- $y^2=20 x^6+60 x^5+10 x^4+64 x^3+63 x^2+37 x+41$
- $y^2=43 x^6+36 x^5+51 x^4+12 x^3+34 x^2+34 x+37$
- $y^2=3 x^6+45 x^5+22 x^4+38 x^3+46 x^2+35 x+57$
- $y^2=25 x^6+13 x^5+2 x^4+64 x^3+53 x^2+12 x+7$
- $y^2=51 x^6+28 x^5+28 x^4+31 x^3+38 x^2+22 x+7$
- $y^2=x^6+61 x^5+42 x^4+54 x^3+56 x^2+63 x+11$
- $y^2=20 x^6+44 x^5+65 x^3+23 x^2+37 x+10$
- $y^2=50 x^6+25 x^5+32 x^4+39 x^3+39 x^2+x+24$
- $y^2=13 x^6+61 x^5+15 x^4+51 x^3+55 x^2+49 x+53$
- $y^2=40 x^6+11 x^5+51 x^4+12 x^3+36 x^2+51 x+48$
- $y^2=27 x^6+32 x^5+17 x^4+46 x^3+8 x^2+58 x+20$
- $y^2=33 x^6+13 x^5+22 x^4+30 x^3+38 x^2+5 x+13$
- $y^2=40 x^6+18 x^5+35 x^4+19 x^3+26 x^2+35 x+30$
- $y^2=52 x^6+55 x^5+14 x^4+29 x^3+59 x^2+61 x+60$
- $y^2=8 x^6+30 x^5+46 x^4+24 x^3+8 x^2+62 x+14$
- $y^2=60 x^6+35 x^5+24 x^4+46 x^3+63 x^2+5 x+10$
- $y^2=28 x^6+58 x^5+41 x^4+47 x^3+19 x^2+39 x+31$
- and 104 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{67}$.
Endomorphism algebra over $\F_{67}$| The endomorphism algebra of this simple isogeny class is 4.0.291648.2. |
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 |
|---|---|---|
| 2.67.q_go | $2$ | (not in LMFDB) |