Invariants
| Base field: | $\F_{73}$ |
| Dimension: | $2$ |
| L-polynomial: | $1 + 48 x^{2} + 5329 x^{4}$ |
| Frobenius angles: | $\pm0.303316561039$, $\pm0.696683438961$ |
| Angle rank: | $1$ (numerical) |
| Number field: | \(\Q(\sqrt{2}, \sqrt{-97})\) |
| Galois group: | $C_2^2$ |
| Jacobians: | $266$ |
| Cyclic group of points: | yes |
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
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $5378$ | $28922884$ | $151333569506$ | $806934696307216$ | $4297625833827215618$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $74$ | $5426$ | $389018$ | $28414950$ | $2073071594$ | $151332912722$ | $11047398519098$ | $806460065908414$ | $58871586708267914$ | $4297625837950873586$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 266 curves (of which all are hyperelliptic):
- $y^2=8 x^6+20 x^5+31 x^4+58 x^3+8 x^2+29 x+55$
- $y^2=40 x^6+27 x^5+9 x^4+71 x^3+40 x^2+72 x+56$
- $y^2=2 x^6+34 x^5+13 x^4+35 x^3+34 x^2+64$
- $y^2=10 x^6+24 x^5+65 x^4+29 x^3+24 x^2+28$
- $y^2=4 x^6+20 x^5+50 x^4+6 x^3+70 x^2+27 x$
- $y^2=20 x^6+27 x^5+31 x^4+30 x^3+58 x^2+62 x$
- $y^2=15 x^6+38 x^5+20 x^4+60 x^3+27 x^2+12 x+10$
- $y^2=2 x^6+44 x^5+27 x^4+8 x^3+62 x^2+60 x+50$
- $y^2=27 x^6+34 x^5+43 x^4+22 x^3+64 x^2+x+19$
- $y^2=62 x^6+24 x^5+69 x^4+37 x^3+28 x^2+5 x+22$
- $y^2=72 x^6+33 x^5+28 x^4+40 x^3+47 x^2+57 x+2$
- $y^2=68 x^6+19 x^5+67 x^4+54 x^3+16 x^2+66 x+10$
- $y^2=33 x^6+27 x^5+56 x^4+69 x^3+70 x^2+5 x+58$
- $y^2=19 x^6+62 x^5+61 x^4+53 x^3+58 x^2+25 x+71$
- $y^2=22 x^6+14 x^5+35 x^4+6 x^3+63 x^2+58 x+72$
- $y^2=37 x^6+70 x^5+29 x^4+30 x^3+23 x^2+71 x+68$
- $y^2=30 x^6+28 x^5+57 x^4+5 x^3+47 x^2+48 x+26$
- $y^2=4 x^6+67 x^5+66 x^4+25 x^3+16 x^2+21 x+57$
- $y^2=39 x^6+38 x^5+18 x^4+8 x^3+72 x^2+68 x+3$
- $y^2=49 x^6+44 x^5+17 x^4+40 x^3+68 x^2+48 x+15$
- and 246 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{73^{2}}$.
Endomorphism algebra over $\F_{73}$| The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{2}, \sqrt{-97})\). |
| The base change of $A$ to $\F_{73^{2}}$ is 1.5329.bw 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-97}) \)$)$ |
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 |
|---|---|---|
| 2.73.a_abw | $4$ | (not in LMFDB) |
| 2.73.ao_du | $8$ | (not in LMFDB) |
| 2.73.o_du | $8$ | (not in LMFDB) |