Invariants
| Base field: | $\F_{3^{4}}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 29 x + 361 x^{2} - 2349 x^{3} + 6561 x^{4}$ |
| Frobenius angles: | $\pm0.0405552772615$, $\pm0.287450300601$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.26125.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $20$ |
| Isomorphism classes: | 28 |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $4545$ | $42273045$ | $282413396745$ | $1853030515239045$ | $12157415098767450000$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $53$ | $6443$ | $531413$ | $43046963$ | $3486712598$ | $282428079803$ | $22876776888893$ | $1853020093048163$ | $150094635187410413$ | $12157665463456559198$ |
Jacobians and polarizations
This isogeny class contains the Jacobians of 20 curves (of which all are hyperelliptic), and hence is principally polarizable:
- $y^2=(2a^3+2)x^6+(a^3+2a^2+2a)x^5+(2a^3+2a+1)x^4+2a^3x^3+(2a^3+2a^2+a)x^2+(a^3+a^2+1)x+a^3+2$
- $y^2=(2a^3+a^2)x^6+(2a+1)x^5+(2a^3+a+1)x^4+(2a^2+a+2)x^3+(a+2)x^2+(a+1)x+a^3+2a^2+a+2$
- $y^2=(a^2+2)x^6+(2a^3+2)x^5+a^2x^4+2a^3x^3+(a^2+a)x^2+(2a^3+2a^2)x+a^3+2a^2$
- $y^2=(2a+2)x^6+(a^3+2a+1)x^5+(a^2+a)x^4+(a^3+2a^2+2a+2)x^3+(a^3+2a^2+2)x^2+(a^3+2a^2+a+2)x+a^3+2a^2$
- $y^2=(a^3+a^2+a)x^6+2a^3x^5+(2a^3+a+1)x^4+2ax^3+(a^3+a)x^2+(2a^3+a^2+2)x+2a^3+2a^2+2$
- $y^2=(2a^3+2a^2+1)x^6+(a^3+a^2+2)x^5+(a^3+2a^2+1)x^4+2a^2x^3+(2a^2+a)x^2+(2a^3+2a^2+a+2)x+2a+1$
- $y^2=(a^3+a^2+2)x^6+(a^3+a)x^5+(2a^3+a+1)x^4+(a^3+2a^2+2a)x^3+a^3x^2+(a^3+2a^2+1)x$
- $y^2=(2a^2+a)x^6+(a^3+2a^2)x^5+(2a^3+a^2+2a)x^4+2x^3+(a^3+2a^2+2a)x^2+(a^3+a^2+a+2)x+2a^3+a+1$
- $y^2=(2a^2+a+1)x^6+(2a^3+a^2+1)x^5+(a^3+2a+2)x^4+(2a^3+a^2)x^3+(2a^3+a)x^2+(a^3+2a^2)x+a^3+2a^2$
- $y^2=(2a^3+a^2+a+1)x^6+(2a^3+2a+2)x^5+(a^3+2a^2+a)x^4+(a^3+2a^2+2a+2)x^3+(2a^3+a^2+2)x^2+(2a^3+2a)x+a^3+a^2$
- $y^2=(a^3+2a^2+a)x^6+(2a^2+1)x^5+(2a^3+2a^2)x^4+(a^3+2a+2)x^3+(2a^2+1)x^2+(a^3+2a^2+1)x+2a^2+2$
- $y^2=(a^3+a^2+2)x^6+(2a^3+2a^2+a)x^5+(a^3+a^2+2a+2)x^4+x^3+(a^3+2a^2+2a)x^2+(2a^3+a^2+a)x+a^3+a^2+a+1$
- $y^2=(2a^3+2a^2+1)x^6+a^3x^5+(2a^2+2a+1)x^4+(2a^3+2a^2+1)x^3+(a^3+2a)x^2+(2a^3+a^2+a+2)x+2a^2+a+1$
- $y^2=(a^3+2a)x^6+(2a^3+2a^2+2)x^5+(a^3+a^2+2)x^4+(a^3+a^2+2a+1)x^3+ax^2+2a^3x+a^3+2a^2+2a+1$
- $y^2=2a^3x^6+(a^3+2a+1)x^5+(2a^3+a^2+2a+1)x^4+(2a^3+2a^2+a+2)x^3+(2a^3+2a+1)x^2+(2a^3+a^2+2a+1)x+2a^3+a^2+2a+2$
- $y^2=(a^3+a)x^6+a^2x^5+(2a^3+a^2)x^4+(2a^3+a^2+2a+1)x^3+(2a^3+a^2+a)x^2+(a^2+2)x+2a^3+a^2+2a$
- $y^2=(2a^2+2a+1)x^6+(2a^3+2a)x^5+(a^3+a^2)x^4+(a^3+2a^2+2a+1)x^3+(2a+2)x^2+(a^3+2)x+2a^3+a^2+a$
- $y^2=(a^3+a^2)x^6+(2a^3+a+1)x^5+(2a^3+2a^2+2a+2)x^4+(a^3+2a^2+a+2)x^3+(a^2+1)x^2+(2a^3+2a^2+2a)x+2a^2$
- $y^2=(2a^3+2a)x^6+(a^3+a^2+a)x^5+(a^3+a^2+2)x^4+(2a^3+a^2+a+1)x^3+(a^3+a^2+a)x^2+(a^3+a^2+2a)x+a^3+a^2+a+1$
- $y^2=(a^3+2a^2+a+1)x^6+(a^2+2)x^5+(2a^2+2)x^4+(a^3+2a^2+a+1)x^3+(2a^2+2)x^2+x+2a^3+a^2+2$
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{3^{4}}$.
Endomorphism algebra over $\F_{3^{4}}$| The endomorphism algebra of this simple isogeny class is 4.0.26125.1. |
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 |
|---|---|---|
| 2.81.bd_nx | $2$ | (not in LMFDB) |