Invariants
| Base field: | $\F_{83}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 12 x + 170 x^{2} - 996 x^{3} + 6889 x^{4}$ |
| Frobenius angles: | $\pm0.279036649609$, $\pm0.494005052484$ |
| Angle rank: | $2$ (numerical) |
| Number field: | \(\Q(\sqrt{-33 -6 \sqrt{2}})\) |
| Galois group: | $D_{4}$ |
| Jacobians: | $188$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $6052$ | $48827536$ | $327744419908$ | $2252250956399616$ | $15516154591706904292$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $72$ | $7086$ | $573192$ | $47457454$ | $3939069432$ | $326940914526$ | $27136042052856$ | $2252292067553758$ | $186940255152439080$ | $15516041201175087246$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 188 curves (of which all are hyperelliptic):
- $y^2=21 x^6+29 x^5+57 x^4+40 x^3+4 x^2+39 x+73$
- $y^2=67 x^6+58 x^5+67 x^4+29 x^3+54 x^2+4 x+56$
- $y^2=44 x^6+52 x^5+22 x^4+67 x^3+66 x^2+64 x+60$
- $y^2=67 x^6+38 x^5+64 x^4+44 x^3+20 x^2+81 x+71$
- $y^2=17 x^6+48 x^5+12 x^4+79 x^3+9 x^2+72 x+56$
- $y^2=65 x^6+36 x^5+3 x^4+31 x^3+80 x^2+2 x+47$
- $y^2=76 x^6+4 x^5+81 x^4+48 x^3+14 x^2+81 x+61$
- $y^2=66 x^6+16 x^5+26 x^4+77 x^3+10 x^2+74 x+12$
- $y^2=34 x^6+50 x^5+36 x^4+47 x^3+79 x^2+9 x+65$
- $y^2=11 x^6+60 x^5+13 x^4+3 x^3+34 x^2+56 x+20$
- $y^2=4 x^6+23 x^5+25 x^4+73 x^3+35 x^2+45 x+66$
- $y^2=21 x^6+56 x^5+42 x^4+10 x^3+54 x^2+67 x+5$
- $y^2=18 x^6+5 x^5+77 x^4+75 x^3+4 x^2+43 x+29$
- $y^2=50 x^6+13 x^5+63 x^4+27 x^3+22 x^2+47 x$
- $y^2=47 x^6+43 x^5+10 x^4+51 x^3+79 x^2+17 x+19$
- $y^2=40 x^6+72 x^5+72 x^4+53 x^3+39 x^2+75 x+73$
- $y^2=47 x^6+14 x^5+61 x^4+73 x^3+22 x^2+37 x+73$
- $y^2=43 x^6+54 x^5+42 x^4+71 x^3+67 x^2+22 x+52$
- $y^2=71 x^6+53 x^5+64 x^4+52 x^3+53 x^2+x+7$
- $y^2=69 x^6+48 x^5+3 x^4+10 x^3+58 x^2+26 x+15$
- and 168 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 \(\Q(\sqrt{-33 -6 \sqrt{2}})\). |
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.m_go | $2$ | (not in LMFDB) |