Properties

Label 2.73.a_abu
Base field $\F_{73}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple yes
Geometrically simple no
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

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Invariants

Base field:  $\F_{73}$
Dimension:  $2$
L-polynomial:  $1 - 46 x^{2} + 5329 x^{4}$
Frobenius angles:  $\pm0.198986253580$, $\pm0.801013746420$
Angle rank:  $1$ (numerical)
Number field:  \(\Q(\zeta_{12})\)
Galois group:  $C_2^2$
Jacobians:  $329$
Cyclic group of points:    no
Non-cyclic primes:   $2$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $5284$ $27920656$ $151334864356$ $806945377222656$ $4297625825559516964$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $74$ $5238$ $389018$ $28415326$ $2073071594$ $151335502422$ $11047398519098$ $806460059555518$ $58871586708267914$ $4297625821415476278$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 329 curves (of which all are hyperelliptic):

  • $y^2=61 x^6+52 x^5+58 x^4+57 x^2+28 x+46$
  • $y^2=37 x^6+52 x^5+47 x^4+68 x^3+4 x^2+63 x+62$
  • $y^2=24 x^6+16 x^5+14 x^4+49 x^3+37 x^2+3 x+51$
  • $y^2=22 x^6+69 x^5+9 x^4+7 x^3+62 x^2+22 x+53$
  • $y^2=3 x^6+64 x^5+38 x^4+29 x^3+56 x^2+12 x+21$
  • $y^2=34 x^6+8 x^5+55 x^4+57 x^3+68 x^2+61 x+71$
  • $y^2=20 x^5+57 x^4+40 x^3+15 x^2+35 x+41$
  • $y^2=27 x^5+66 x^4+54 x^3+2 x^2+29 x+59$
  • $y^2=10 x^6+46 x^5+34 x^4+17 x^3+47 x^2+36 x+1$
  • $y^2=50 x^6+11 x^5+24 x^4+12 x^3+16 x^2+34 x+5$
  • $y^2=33 x^6+7 x^5+34 x^4+2 x^3+62 x^2+72 x+55$
  • $y^2=19 x^6+35 x^5+24 x^4+10 x^3+18 x^2+68 x+56$
  • $y^2=27 x^6+63 x^5+64 x^4+45 x^3+60 x^2+32 x+54$
  • $y^2=62 x^6+23 x^5+28 x^4+6 x^3+8 x^2+14 x+51$
  • $y^2=41 x^6+50 x^5+8 x^4+45 x^3+30 x^2+37 x+28$
  • $y^2=51 x^6+61 x^5+47 x^4+51 x^3+20 x^2+23 x+17$
  • $y^2=36 x^6+13 x^5+16 x^4+36 x^3+27 x^2+42 x+12$
  • $y^2=70 x^6+67 x^5+49 x^4+72 x^3+45 x^2+4 x+51$
  • $y^2=21 x^6+39 x^5+8 x^4+59 x^3+23 x^2+9 x+40$
  • $y^2=32 x^6+49 x^5+40 x^4+3 x^3+42 x^2+45 x+54$
  • and 309 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 \(\Q(\zeta_{12})\).
Endomorphism algebra over $\overline{\F}_{73}$
The base change of $A$ to $\F_{73^{2}}$ is 1.5329.abu 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-3}) \)$)$

Base change

This is a primitive isogeny class.

Twists

Below are some of the twists of this isogeny class.

TwistExtension degreeCommon base change
2.73.a_adt$3$(not in LMFDB)
2.73.a_fn$3$(not in LMFDB)
2.73.au_jm$4$(not in LMFDB)

Below is a list of all twists of this isogeny class.

TwistExtension degreeCommon base change
2.73.a_adt$3$(not in LMFDB)
2.73.a_fn$3$(not in LMFDB)
2.73.au_jm$4$(not in LMFDB)
2.73.a_bu$4$(not in LMFDB)
2.73.u_jm$4$(not in LMFDB)
2.73.abi_qt$12$(not in LMFDB)
2.73.abb_me$12$(not in LMFDB)
2.73.ay_kf$12$(not in LMFDB)
2.73.ar_ii$12$(not in LMFDB)
2.73.ao_hn$12$(not in LMFDB)
2.73.ak_bb$12$(not in LMFDB)
2.73.ah_ay$12$(not in LMFDB)
2.73.ad_cy$12$(not in LMFDB)
2.73.a_afn$12$(not in LMFDB)
2.73.a_dt$12$(not in LMFDB)
2.73.d_cy$12$(not in LMFDB)
2.73.h_ay$12$(not in LMFDB)
2.73.k_bb$12$(not in LMFDB)
2.73.o_hn$12$(not in LMFDB)
2.73.r_ii$12$(not in LMFDB)
2.73.y_kf$12$(not in LMFDB)
2.73.bb_me$12$(not in LMFDB)
2.73.bi_qt$12$(not in LMFDB)