Invariants
| Base field: | $\F_{83}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 58 x^{2} + 6889 x^{4}$ |
| Frobenius angles: | $\pm0.193193129211$, $\pm0.806806870789$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{-3}, \sqrt{14})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $308$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $6832$ | $46676224$ | $326941376944$ | $2253280897437696$ | $15516041179507216432$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $84$ | $6774$ | $571788$ | $47479150$ | $3939040644$ | $326942380518$ | $27136050989628$ | $2252292205069534$ | $186940255267540404$ | $15516041171808579414$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 308 curves (of which all are hyperelliptic):
- $y^2=20 x^6+74 x^5+24 x^4+49 x^3+13 x^2+17 x+73$
- $y^2=40 x^6+65 x^5+48 x^4+15 x^3+26 x^2+34 x+63$
- $y^2=80 x^6+30 x^5+9 x^4+38 x^3+57 x^2+69 x+31$
- $y^2=4 x^6+71 x^5+41 x^4+42 x^3+24 x^2+74 x+22$
- $y^2=5 x^6+36 x^5+17 x^4+40 x^3+54 x^2+68 x+30$
- $y^2=53 x^6+44 x^5+x^4+50 x^3+55 x^2+80 x+66$
- $y^2=23 x^6+5 x^5+2 x^4+17 x^3+27 x^2+77 x+49$
- $y^2=70 x^6+34 x^5+58 x^4+5 x^3+13 x^2+17 x+71$
- $y^2=57 x^6+68 x^5+33 x^4+10 x^3+26 x^2+34 x+59$
- $y^2=35 x^6+10 x^5+76 x^4+34 x^3+29 x^2+33 x+46$
- $y^2=55 x^6+51 x^5+43 x^4+47 x^3+77 x^2+69 x+49$
- $y^2=34 x^6+26 x^5+10 x^4+82 x^3+10 x^2+23 x+61$
- $y^2=68 x^6+52 x^5+20 x^4+81 x^3+20 x^2+46 x+39$
- $y^2=10 x^6+3 x^5+23 x^4+16 x^3+51 x^2+27 x+70$
- $y^2=20 x^6+6 x^5+46 x^4+32 x^3+19 x^2+54 x+57$
- $y^2=52 x^6+79 x^5+16 x^4+37 x^3+6 x^2+73 x+60$
- $y^2=21 x^6+75 x^5+32 x^4+74 x^3+12 x^2+63 x+37$
- $y^2=35 x^6+49 x^5+76 x^4+45 x^3+14 x^2+2 x+67$
- $y^2=13 x^6+53 x^5+56 x^4+11 x^3+10 x^2+56 x+51$
- $y^2=62 x^6+x^5+67 x^4+28 x^3+40 x^2+57 x$
- and 288 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{83^{2}}$.
Endomorphism algebra over $\F_{83}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-3}, \sqrt{14})\). |
| The base change of $A$ to $\F_{83^{2}}$ is 1.6889.acg 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-42}) \)$)$ |
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.as_hj | $3$ | (not in LMFDB) |
| 2.83.s_hj | $3$ | (not in LMFDB) |
| 2.83.a_cg | $4$ | (not in LMFDB) |