Invariants
| Base field: | $\F_{83}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 11 x + 115 x^{2} - 913 x^{3} + 6889 x^{4}$ |
| Frobenius angles: | $\pm0.206654751344$, $\pm0.561772791423$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.6555341.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $140$ |
| Cyclic group of points: | yes |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $6081$ | $48216249$ | $326783812419$ | $2252384897307021$ | $15516940900652151216$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $73$ | $6999$ | $571513$ | $47460275$ | $3939269048$ | $326941659243$ | $27136042545335$ | $2252292186455059$ | $186940255336637179$ | $15516041176651557414$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 140 curves (of which all are hyperelliptic):
- $y^2=38 x^6+29 x^5+42 x^4+58 x^3+3 x^2+49 x+66$
- $y^2=81 x^6+42 x^5+69 x^4+51 x^3+25 x^2+18 x+14$
- $y^2=22 x^6+36 x^5+68 x^4+76 x^3+63 x^2+43 x+58$
- $y^2=2 x^6+20 x^5+22 x^4+23 x^3+67 x^2+42 x+42$
- $y^2=67 x^6+31 x^5+68 x^4+4 x^3+28 x^2+44 x+55$
- $y^2=43 x^6+x^5+45 x^4+26 x^3+65 x^2+81 x+79$
- $y^2=76 x^6+20 x^5+30 x^4+78 x^3+20 x^2+56 x+61$
- $y^2=33 x^6+27 x^5+67 x^3+67 x^2+30 x+80$
- $y^2=11 x^6+31 x^5+75 x^4+70 x^3+20 x^2+16 x+82$
- $y^2=40 x^6+43 x^5+73 x^4+24 x^3+48 x^2+77 x+67$
- $y^2=18 x^6+55 x^5+2 x^4+62 x^3+25 x^2+13 x+59$
- $y^2=71 x^6+5 x^5+11 x^4+30 x^3+15 x^2+26 x+15$
- $y^2=45 x^6+80 x^5+23 x^4+50 x^3+48 x^2+64 x+69$
- $y^2=62 x^6+38 x^5+16 x^4+29 x^3+44 x^2+21 x+14$
- $y^2=32 x^6+59 x^5+70 x^4+38 x^3+48 x^2+57 x+32$
- $y^2=24 x^6+37 x^5+23 x^4+49 x^3+66 x^2+52 x+51$
- $y^2=44 x^6+3 x^5+53 x^4+21 x^3+21 x^2+34 x+35$
- $y^2=12 x^6+78 x^5+70 x^4+81 x^3+56 x^2+4 x$
- $y^2=68 x^6+62 x^5+17 x^4+67 x^3+80 x^2+57 x+19$
- $y^2=34 x^6+77 x^5+77 x^4+58 x^3+6 x^2+30$
- and 120 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{83}$.
Endomorphism algebra over $\F_{83}$| The endomorphism algebra of this simple isogeny class is 4.0.6555341.1. |
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 |
|---|---|---|
| 2.83.l_el | $2$ | (not in LMFDB) |