Invariants
| Base field: | $\F_{83}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 8 x + 174 x^{2} - 664 x^{3} + 6889 x^{4}$ |
| Frobenius angles: | $\pm0.377725582307$, $\pm0.479519049974$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.1509632.2 |
| Galois group: | $D_{4}$ |
| Jacobians: | $154$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $6392$ | $49448512$ | $327897947384$ | $2251637598331904$ | $15515420375446255672$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $76$ | $7174$ | $573460$ | $47444526$ | $3938883036$ | $326940666742$ | $27136060081444$ | $2252292244215774$ | $186940255062738796$ | $15516041187482015334$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 154 curves (of which all are hyperelliptic):
- $y^2=26 x^6+2 x^5+12 x^4+30 x^3+15 x^2+26 x+30$
- $y^2=20 x^6+73 x^5+73 x^3+81 x^2+32 x+77$
- $y^2=24 x^6+20 x^5+35 x^4+2 x^3+8 x^2+45 x+20$
- $y^2=60 x^6+48 x^5+58 x^4+33 x^3+75 x^2+77 x+48$
- $y^2=14 x^6+37 x^5+65 x^4+33 x^3+26 x^2+10 x+9$
- $y^2=51 x^6+17 x^5+3 x^4+12 x^3+52 x^2+40 x+46$
- $y^2=25 x^6+25 x^5+47 x^4+56 x^3+52 x^2+54 x+14$
- $y^2=67 x^6+64 x^5+39 x^4+78 x^3+29 x^2+61 x+77$
- $y^2=8 x^6+21 x^5+29 x^4+27 x^3+29 x^2+7 x+7$
- $y^2=8 x^6+12 x^5+38 x^4+64 x^3+28 x^2+32 x+67$
- $y^2=37 x^6+24 x^5+43 x^4+81 x^3+73 x^2+34 x+79$
- $y^2=2 x^6+44 x^5+13 x^4+69 x^3+9 x^2+14$
- $y^2=26 x^6+50 x^5+67 x^4+21 x^3+6 x^2+55 x+22$
- $y^2=34 x^6+40 x^5+48 x^4+69 x^3+55 x^2+23 x+60$
- $y^2=79 x^6+72 x^5+16 x^4+8 x^3+29 x^2+27 x+67$
- $y^2=68 x^6+15 x^5+55 x^4+2 x^3+79 x^2+4 x+24$
- $y^2=42 x^6+27 x^5+62 x^4+29 x^3+34 x^2+4 x+34$
- $y^2=52 x^6+14 x^5+64 x^4+48 x^3+58 x^2+29 x+78$
- $y^2=11 x^6+4 x^5+21 x^4+77 x^3+19 x^2+48 x+46$
- $y^2=63 x^6+9 x^5+54 x^4+31 x^3+64 x^2+50 x+10$
- and 134 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 4.0.1509632.2. |
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.i_gs | $2$ | (not in LMFDB) |