Invariants
| Base field: | $\F_{89}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 4 x + 174 x^{2} - 356 x^{3} + 7921 x^{4}$ |
| Frobenius angles: | $\pm0.417626200076$, $\pm0.513980383187$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.1891328.4 |
| Galois group: | $D_{4}$ |
| Jacobians: | $126$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $7736$ | $65415616$ | $497656392632$ | $3935103070051328$ | $31181098966706754616$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $86$ | $8254$ | $705926$ | $62718558$ | $5583948246$ | $496982677726$ | $44231343788102$ | $3936588747987774$ | $350356403303855318$ | $31181719930575151614$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 126 curves (of which all are hyperelliptic):
- $y^2=19 x^6+44 x^5+77 x^4+20 x^3+35 x^2+36 x+15$
- $y^2=36 x^6+39 x^5+64 x^4+6 x^3+34 x^2+16 x+84$
- $y^2=80 x^6+2 x^5+7 x^4+54 x^3+56 x^2+75 x+5$
- $y^2=37 x^6+43 x^5+66 x^4+56 x^3+17 x^2+21 x+42$
- $y^2=71 x^6+47 x^5+88 x^4+14 x^3+79 x^2+47 x+86$
- $y^2=72 x^6+75 x^5+52 x^4+5 x^3+68 x^2+4 x+17$
- $y^2=72 x^6+53 x^5+2 x^4+71 x^3+59 x^2+19 x+59$
- $y^2=41 x^6+7 x^5+40 x^4+84 x^3+47 x^2+50 x+79$
- $y^2=8 x^6+3 x^5+2 x^4+31 x^3+21 x^2+4 x+68$
- $y^2=36 x^6+74 x^5+60 x^4+85 x^3+37 x^2+7 x+17$
- $y^2=63 x^6+26 x^5+80 x^4+12 x^3+38 x^2+2 x+70$
- $y^2=31 x^6+61 x^5+29 x^4+48 x^3+37 x^2+50 x+39$
- $y^2=3 x^6+40 x^5+5 x^4+52 x^3+87 x^2+30 x+72$
- $y^2=49 x^6+44 x^4+27 x^3+26 x^2+22 x+78$
- $y^2=77 x^6+46 x^5+43 x^4+39 x^3+19 x^2+80 x+15$
- $y^2=16 x^6+36 x^5+34 x^4+30 x^3+62 x^2+82 x+41$
- $y^2=83 x^6+46 x^5+82 x^4+54 x^3+57 x^2+5 x+43$
- $y^2=68 x^6+51 x^5+82 x^4+87 x^3+20 x^2+29 x+64$
- $y^2=50 x^6+42 x^4+88 x^3+38 x^2+7 x+53$
- $y^2=6 x^6+43 x^5+61 x^4+10 x^3+30 x^2+45 x+42$
- and 106 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{89}$.
Endomorphism algebra over $\F_{89}$| The endomorphism algebra of this simple isogeny class is 4.0.1891328.4. |
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 |
|---|---|---|
| 2.89.e_gs | $2$ | (not in LMFDB) |