Invariants
| Base field: | $\F_{89}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 18 x + 196 x^{2} + 1602 x^{3} + 7921 x^{4}$ |
| Frobenius angles: | $\pm0.517938434508$, $\pm0.854743420549$ |
| Angle rank: | $2$ (numerical) |
| Number field: | 4.0.19233088.1 |
| Galois group: | $D_{4}$ |
| Jacobians: | $216$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $3$ |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $9738$ | $63277524$ | $497020674186$ | $3935870345433168$ | $31181407441946725338$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $108$ | $7990$ | $705024$ | $62730790$ | $5584003488$ | $496983917734$ | $44231316500556$ | $3936588802326718$ | $350356403608842924$ | $31181719941065403430$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 216 curves (of which all are hyperelliptic):
- $y^2=51 x^6+73 x^5+34 x^4+68 x^3+31 x^2+86 x+47$
- $y^2=46 x^6+x^5+71 x^4+50 x^3+11 x^2+73 x+86$
- $y^2=68 x^6+21 x^5+x^4+8 x^3+52 x^2+50 x+49$
- $y^2=62 x^6+14 x^5+72 x^4+54 x^3+65 x^2+76 x+35$
- $y^2=34 x^6+6 x^5+66 x^4+71 x^3+55 x^2+6 x+9$
- $y^2=60 x^6+22 x^5+60 x^4+48 x^3+13 x^2+29 x+10$
- $y^2=68 x^6+77 x^5+82 x^4+56 x^3+39 x^2+6 x+50$
- $y^2=58 x^6+10 x^5+44 x^4+71 x^3+46 x^2+67 x+9$
- $y^2=30 x^6+26 x^5+48 x^4+72 x^3+65 x+25$
- $y^2=35 x^6+24 x^5+34 x^4+7 x^3+73 x^2+69 x+34$
- $y^2=13 x^6+x^5+10 x^4+20 x^3+62 x^2+32 x+41$
- $y^2=61 x^6+15 x^5+36 x^4+62 x^3+8 x^2+56 x+32$
- $y^2=16 x^6+11 x^5+10 x^4+19 x^3+69 x^2+10 x+47$
- $y^2=61 x^5+79 x^4+9 x^3+33 x^2+82 x+16$
- $y^2=68 x^6+33 x^5+20 x^4+14 x^3+71 x^2+86 x+38$
- $y^2=33 x^6+35 x^5+54 x^4+13 x^3+15 x^2+3 x+50$
- $y^2=53 x^6+40 x^5+11 x^4+30 x^3+12 x^2+16 x+54$
- $y^2=4 x^6+60 x^5+25 x^4+31 x^3+50 x^2+55 x+71$
- $y^2=34 x^6+50 x^5+6 x^4+14 x^3+43 x^2+50 x+11$
- $y^2=6 x^6+24 x^5+68 x^4+80 x^3+58 x^2+27 x+5$
- and 196 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 4.0.19233088.1. |
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.as_ho | $2$ | (not in LMFDB) |