Invariants
| Base field: | $\F_{43}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 4 x + 43 x^{2} )( 1 + 4 x + 43 x^{2} )$ |
| $1 + 70 x^{2} + 1849 x^{4}$ | |
| Frobenius angles: | $\pm0.401344489543$, $\pm0.598655510457$ |
| Angle rank: | $1$ (numerical) |
| Jacobians: | $268$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $1920$ | $3686400$ | $6321317760$ | $11679989760000$ | $21611482019529600$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $44$ | $1990$ | $79508$ | $3416398$ | $147008444$ | $6321272470$ | $271818611108$ | $11688211063198$ | $502592611936844$ | $21611481725774950$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 268 curves (of which all are hyperelliptic):
- $y^2=41 x^6+33 x^5+32 x^4+20 x^3+8 x^2+5 x+12$
- $y^2=3 x^6+22 x^5+36 x^4+4 x^3+36 x^2+22 x+3$
- $y^2=9 x^6+23 x^5+22 x^4+12 x^3+22 x^2+23 x+9$
- $y^2=27 x^6+14 x^5+22 x^4+35 x^3+6 x^2+38 x+1$
- $y^2=41 x^6+9 x^5+14 x^3+4 x+1$
- $y^2=37 x^6+27 x^5+42 x^3+12 x+3$
- $y^2=41 x^6+26 x^5+36 x^4+14 x^3+27 x^2+5 x+31$
- $y^2=37 x^6+35 x^5+22 x^4+42 x^3+38 x^2+15 x+7$
- $y^2=11 x^6+13 x^5+29 x^4+20 x^3+29 x^2+13 x+11$
- $y^2=33 x^6+39 x^5+x^4+17 x^3+x^2+39 x+33$
- $y^2=18 x^6+3 x^5+21 x^4+25 x^3+9 x^2+26 x+30$
- $y^2=11 x^6+9 x^5+20 x^4+32 x^3+27 x^2+35 x+4$
- $y^2=17 x^6+9 x^5+21 x^4+32 x^3+8 x^2+10 x+37$
- $y^2=8 x^6+27 x^5+20 x^4+10 x^3+24 x^2+30 x+25$
- $y^2=39 x^5+33 x^4+12 x^3+11 x^2+33 x$
- $y^2=31 x^6+4 x^5+28 x^4+4 x^3+41 x^2+36 x+20$
- $y^2=14 x^6+39 x^5+11 x^4+25 x^3+2 x^2+38 x+24$
- $y^2=40 x^6+37 x^5+4 x^4+23 x^3+11 x^2+x+21$
- $y^2=34 x^6+25 x^5+12 x^4+26 x^3+33 x^2+3 x+20$
- $y^2=11 x^6+35 x^5+36 x^4+33 x^3+10 x^2+10 x+35$
- and 248 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{43^{2}}$.
Endomorphism algebra over $\F_{43}$| The isogeny class factors as 1.43.ae $\times$ 1.43.e and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is: |
| The base change of $A$ to $\F_{43^{2}}$ is 1.1849.cs 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-39}) \)$)$ |
Base change
This is a primitive isogeny class.