Invariants
| Base field: | $\F_{79}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 16 x + 177 x^{2} - 1264 x^{3} + 6241 x^{4}$ |
| Frobenius angles: | $\pm0.189818400690$, $\pm0.476848265977$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{-3}, \sqrt{5})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $282$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $5139$ | $39565161$ | $243388302336$ | $1516996680903369$ | $9468491675338364499$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $64$ | $6340$ | $493648$ | $38947204$ | $3077126464$ | $243089242846$ | $19203917749696$ | $1517108740289284$ | $119851595139504112$ | $9468276081381698500$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 282 curves (of which all are hyperelliptic):
- $y^2=42 x^6+31 x^5+46 x^4+57 x^3+54 x^2+42 x+57$
- $y^2=61 x^6+31 x^5+25 x^4+65 x^3+62 x^2+27 x+34$
- $y^2=24 x^6+2 x^5+69 x^4+31 x^3+78 x^2+64 x+59$
- $y^2=37 x^6+32 x^5+70 x^4+33 x^3+57 x^2+26 x+54$
- $y^2=9 x^6+43 x^5+61 x^4+66 x^3+28 x^2+23 x+40$
- $y^2=43 x^6+61 x^5+46 x^4+29 x^3+68 x^2+5 x+57$
- $y^2=23 x^6+18 x^5+25 x^4+75 x^3+71 x^2+24 x+73$
- $y^2=63 x^6+73 x^5+42 x^4+29 x^3+20 x^2+70 x+60$
- $y^2=60 x^6+61 x^5+61 x^4+65 x^3+33 x^2+10 x+36$
- $y^2=78 x^6+54 x^5+63 x^4+18 x^3+50 x^2+44 x+21$
- $y^2=2 x^6+51 x^5+31 x^4+x^3+54 x^2+53 x+71$
- $y^2=39 x^6+75 x^5+55 x^4+25 x^3+74 x^2+54 x+72$
- $y^2=31 x^6+64 x^5+51 x^4+5 x^3+11 x^2+22 x+33$
- $y^2=57 x^6+27 x^5+27 x^4+55 x^3+21 x^2+78 x+29$
- $y^2=32 x^6+76 x^5+55 x^4+43 x^3+74 x^2+63 x+3$
- $y^2=7 x^6+9 x^5+56 x^4+12 x^3+9 x^2+32 x+9$
- $y^2=23 x^6+66 x^5+58 x^4+21 x^3+5 x^2+36 x+56$
- $y^2=71 x^6+25 x^5+53 x^4+16 x^3+21 x^2+70 x+8$
- $y^2=11 x^6+45 x^5+69 x^4+26 x^3+78 x^2+36 x+6$
- $y^2=11 x^6+13 x^5+68 x^4+67 x^3+x^2+52 x+54$
- and 262 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{79^{3}}$.
Endomorphism algebra over $\F_{79}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-3}, \sqrt{5})\). |
| The base change of $A$ to $\F_{79^{3}}$ is 1.493039.ls 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-15}) \)$)$ |
Base change
This is a primitive isogeny class.