Invariants
| Base field: | $\F_{89}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 - 12 x + 89 x^{2} )( 1 + 9 x + 89 x^{2} )$ |
| $1 - 3 x + 70 x^{2} - 267 x^{3} + 7921 x^{4}$ | |
| Frobenius angles: | $\pm0.280588346245$, $\pm0.658275487260$ |
| Angle rank: | $2$ (numerical) |
| Jacobians: | $390$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $3$ |
This isogeny class is not 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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $7722$ | $63799164$ | $496840646016$ | $3937914079070400$ | $31182479137191927402$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $87$ | $8053$ | $704772$ | $62763361$ | $5584195407$ | $496979129986$ | $44231326102743$ | $3936588799608961$ | $350356402650804948$ | $31181719941992078053$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 390 curves (of which all are hyperelliptic):
- $y^2=62 x^6+2 x^5+66 x^4+6 x^3+19 x^2+51 x+41$
- $y^2=9 x^6+67 x^5+27 x^4+41 x^3+34 x^2+66 x+36$
- $y^2=76 x^6+77 x^5+34 x^4+56 x^3+34 x^2+55 x+54$
- $y^2=14 x^6+28 x^5+70 x^4+69 x^3+11 x^2+14$
- $y^2=29 x^6+58 x^5+19 x^4+25 x^3+48 x^2+54 x+9$
- $y^2=61 x^6+36 x^5+71 x^4+14 x^3+50 x^2+22 x+30$
- $y^2=77 x^6+61 x^5+87 x^4+83 x^3+6 x^2+84 x+51$
- $y^2=25 x^6+6 x^5+60 x^4+84 x^3+9 x^2+9 x+85$
- $y^2=82 x^6+58 x^5+26 x^4+45 x^3+47 x^2+53 x+60$
- $y^2=64 x^6+43 x^5+86 x^4+32 x^3+78 x^2+78 x+12$
- $y^2=32 x^6+22 x^5+79 x^4+60 x^3+44 x^2+29 x+62$
- $y^2=71 x^6+76 x^5+61 x^4+64 x^3+17 x^2+24 x+72$
- $y^2=74 x^6+62 x^5+53 x^4+9 x^3+40 x^2+41 x+9$
- $y^2=x^6+86 x^5+87 x^4+88 x^3+5 x^2+79 x+27$
- $y^2=51 x^6+32 x^5+50 x^4+64 x^3+59 x^2+41 x+19$
- $y^2=85 x^6+67 x^5+87 x^4+20 x^3+83 x^2+12 x+62$
- $y^2=62 x^6+46 x^5+45 x^4+57 x^3+19 x^2+25 x+17$
- $y^2=65 x^6+22 x^5+12 x^4+67 x^3+75 x^2+58 x+21$
- $y^2=38 x^6+45 x^5+37 x^4+86 x^3+9 x^2+78 x+6$
- $y^2=81 x^6+2 x^5+71 x^4+4 x^3+19 x^2+29 x+1$
- and 370 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{89}$.
Endomorphism algebra over $\F_{89}$| The isogeny class factors as 1.89.am $\times$ 1.89.j and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is: |
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.av_la | $2$ | (not in LMFDB) |
| 2.89.d_cs | $2$ | (not in LMFDB) |
| 2.89.v_la | $2$ | (not in LMFDB) |