Invariants
| Base field: | $\F_{53}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 2 x + 2 x^{2} + 106 x^{3} + 2809 x^{4}$ |
| Frobenius angles: | $\pm0.280965808385$, $\pm0.780965808385$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(i, \sqrt{105})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $184$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $2920$ | $7895680$ | $22211158120$ | $62341762662400$ | $174876163561273000$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $56$ | $2810$ | $149192$ | $7900878$ | $418168456$ | $22164361130$ | $1174709209912$ | $62259667934878$ | $3299763716564696$ | $174887470365513050$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 184 curves (of which all are hyperelliptic):
- $y^2=42 x^6+27 x^5+27 x^4+48 x^3+41 x^2+11 x+36$
- $y^2=22 x^6+31 x^5+7 x^4+35 x^3+x^2+30 x+20$
- $y^2=13 x^6+36 x^5+47 x^4+2 x^3+43 x^2+21 x+31$
- $y^2=49 x^5+12 x^4+13 x^3+35 x^2+47 x+9$
- $y^2=52 x^6+7 x^5+18 x^4+46 x^3+44 x^2+34 x+13$
- $y^2=9 x^6+20 x^5+44 x^4+49 x^3+7 x^2+22 x+27$
- $y^2=6 x^6+31 x^5+35 x^4+50 x^3+51 x^2+46 x+9$
- $y^2=37 x^6+4 x^5+45 x^4+31 x^2+46 x+28$
- $y^2=34 x^6+35 x^5+5 x^4+25 x^3+44 x^2+2 x+9$
- $y^2=49 x^6+39 x^5+22 x^4+21 x^3+29 x^2+43 x+35$
- $y^2=33 x^6+x^5+21 x^4+9 x^3+27 x^2+47 x+27$
- $y^2=39 x^6+17 x^5+11 x^4+x^3+37 x^2+3 x+29$
- $y^2=5 x^6+3 x^5+8 x^4+15 x^3+17 x^2+42 x+30$
- $y^2=21 x^6+23 x^5+17 x^4+17 x^2+30 x+21$
- $y^2=8 x^5+34 x^4+19 x^3+15 x^2+37 x+6$
- $y^2=7 x^6+24 x^5+48 x^4+48 x^3+35 x^2+28 x+49$
- $y^2=3 x^5+30 x^4+23 x^3+41 x^2+25 x+28$
- $y^2=39 x^6+23 x^5+40 x^4+18 x^3+8 x^2+2 x+38$
- $y^2=17 x^5+17 x^4+51 x^3+40 x^2+21 x+17$
- $y^2=35 x^6+6 x^5+17 x^4+25 x^3+33 x^2+43 x+34$
- and 164 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{53^{4}}$.
Endomorphism algebra over $\F_{53}$| The endomorphism algebra of this simple isogeny class is \(\Q(i, \sqrt{105})\). |
| The base change of $A$ to $\F_{53^{4}}$ is 1.7890481.hry 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-105}) \)$)$ |
- Endomorphism algebra over $\F_{53^{2}}$
The base change of $A$ to $\F_{53^{2}}$ is the simple isogeny class 2.2809.a_hry and its endomorphism algebra is \(\Q(i, \sqrt{105})\).
Base change
This is a primitive isogeny class.