Invariants
| Base field: | $\F_{89}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 - 4 x - 22 x^{2} - 356 x^{3} + 7921 x^{4}$ |
| Frobenius angles: | $\pm0.168589219160$, $\pm0.725646076070$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.193930560.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $364$ |
| 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $7540$ | $62280400$ | $495998519380$ | $3938054463616000$ | $31182127770788031700$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $86$ | $7862$ | $703574$ | $62765598$ | $5584132486$ | $496982075222$ | $44231359011814$ | $3936588760418878$ | $350356403757589046$ | $31181719931543642102$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 364 curves (of which all are hyperelliptic):
- $y^2=43 x^6+28 x^5+14 x^4+24 x^3+32 x^2+58 x+85$
- $y^2=2 x^6+81 x^5+76 x^4+78 x^3+35 x^2+39 x+40$
- $y^2=85 x^6+58 x^5+51 x^4+3 x^3+46 x^2+18 x+5$
- $y^2=12 x^6+11 x^5+78 x^4+2 x^3+52 x^2+26 x+88$
- $y^2=58 x^6+44 x^5+44 x^4+3 x^3+88 x^2+74 x+64$
- $y^2=73 x^6+15 x^5+14 x^4+2 x^3+25 x^2+81 x+4$
- $y^2=30 x^6+2 x^5+18 x^4+26 x^3+x^2+73 x+56$
- $y^2=30 x^6+2 x^5+80 x^4+8 x^3+42 x^2+63 x+76$
- $y^2=55 x^6+32 x^5+63 x^4+56 x^3+80 x^2+30 x+51$
- $y^2=45 x^6+65 x^5+77 x^4+18 x^3+35 x^2+5 x+58$
- $y^2=5 x^6+88 x^5+82 x^4+3 x^3+79 x^2+72 x+13$
- $y^2=66 x^6+5 x^5+72 x^4+24 x^3+40 x^2+49 x+34$
- $y^2=46 x^6+32 x^5+63 x^4+x^3+25 x^2+70 x+51$
- $y^2=83 x^6+6 x^5+15 x^4+7 x^3+76 x^2+50 x+9$
- $y^2=47 x^6+32 x^5+11 x^4+70 x^3+71 x^2+80 x+85$
- $y^2=69 x^6+49 x^5+67 x^4+15 x^3+77 x^2+81 x+62$
- $y^2=79 x^6+80 x^5+75 x^4+51 x^3+75 x^2+31 x+68$
- $y^2=2 x^6+3 x^5+25 x^4+20 x^3+12 x^2+46 x+73$
- $y^2=10 x^6+41 x^5+77 x^4+8 x^3+28 x^2+11 x+38$
- $y^2=31 x^6+19 x^5+65 x^4+49 x^3+8 x^2+56 x+12$
- and 344 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 4.0.193930560.1. |
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 |
|---|---|---|
| 2.89.e_aw | $2$ | (not in LMFDB) |