Invariants
| Base field: | $\F_{53}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 25 x^{2} + 2809 x^{4}$ |
| Frobenius angles: | $\pm0.212106452697$, $\pm0.787893547303$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(i, \sqrt{131})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $180$ |
| Isomorphism classes: | 105 |
| Cyclic group of points: | yes |
This isogeny class is simple but not 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $2785$ | $7756225$ | $22164556180$ | $62338525475625$ | $174887469588890425$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $54$ | $2760$ | $148878$ | $7900468$ | $418195494$ | $22164751230$ | $1174711139838$ | $62259672113188$ | $3299763591802134$ | $174887468812267800$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 180 curves (of which all are hyperelliptic):
- $y^2=47 x^6+18 x^5+46 x^4+41 x^3+7 x^2+34 x+6$
- $y^2=41 x^6+36 x^5+39 x^4+29 x^3+14 x^2+15 x+12$
- $y^2=52 x^6+6 x^5+6 x^4+11 x^3+24 x^2+10 x+35$
- $y^2=51 x^6+12 x^5+12 x^4+22 x^3+48 x^2+20 x+17$
- $y^2=11 x^6+43 x^5+36 x^4+18 x^3+9 x^2+41 x+24$
- $y^2=22 x^6+33 x^5+19 x^4+36 x^3+18 x^2+29 x+48$
- $y^2=28 x^6+2 x^5+11 x^4+52 x^3+16 x^2+49 x+37$
- $y^2=3 x^6+4 x^5+22 x^4+51 x^3+32 x^2+45 x+21$
- $y^2=x^6+38 x^5+44 x^4+47 x^3+12 x^2+37 x+45$
- $y^2=2 x^6+23 x^5+35 x^4+41 x^3+24 x^2+21 x+37$
- $y^2=18 x^6+12 x^5+35 x^4+35 x^3+38 x^2+26 x+6$
- $y^2=10 x^6+30 x^5+10 x^4+21 x^3+15 x^2+20 x+11$
- $y^2=20 x^6+7 x^5+20 x^4+42 x^3+30 x^2+40 x+22$
- $y^2=34 x^6+24 x^5+16 x^4+16 x^3+30 x^2+42 x+27$
- $y^2=15 x^6+48 x^5+32 x^4+32 x^3+7 x^2+31 x+1$
- $y^2=16 x^6+9 x^5+49 x^4+18 x^3+9 x+34$
- $y^2=32 x^6+18 x^5+45 x^4+36 x^3+18 x+15$
- $y^2=20 x^6+27 x^5+22 x^4+20 x^3+26 x^2+13 x+35$
- $y^2=40 x^6+x^5+44 x^4+40 x^3+52 x^2+26 x+17$
- $y^2=29 x^6+40 x^5+40 x^4+40 x^3+51 x^2+2 x+34$
- and 160 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{53^{2}}$.
Endomorphism algebra over $\F_{53}$| The endomorphism algebra of this simple isogeny class is \(\Q(i, \sqrt{131})\). |
| The base change of $A$ to $\F_{53^{2}}$ is 1.2809.az 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-131}) \)$)$ |
Base change
This is a primitive isogeny class.