Properties

Label 2.43.a_w
Base field $\F_{43}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple no
Geometrically simple no
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

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Invariants

Base field:  $\F_{43}$
Dimension:  $2$
L-polynomial:  $( 1 - 8 x + 43 x^{2} )( 1 + 8 x + 43 x^{2} )$
  $1 + 22 x^{2} + 1849 x^{4}$
Frobenius angles:  $\pm0.291171725172$, $\pm0.708828274828$
Angle rank:  $1$ (numerical)
Jacobians:  $300$
Cyclic group of points:    no
Non-cyclic primes:   $2, 3$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $1872$ $3504384$ $6321251664$ $11710193504256$ $21611482596065232$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $44$ $1894$ $79508$ $3425230$ $147008444$ $6321140278$ $271818611108$ $11688193293214$ $502592611936844$ $21611482878846214$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 300 curves (of which all are hyperelliptic):

  • $y^2=39 x^6+9 x^5+40 x^4+20 x^3+33 x^2+6 x+28$
  • $y^2=31 x^6+27 x^5+34 x^4+17 x^3+13 x^2+18 x+41$
  • $y^2=10 x^5+8 x^4+20 x^3+10 x^2+21 x+7$
  • $y^2=30 x^5+24 x^4+17 x^3+30 x^2+20 x+21$
  • $y^2=33 x^6+8 x^5+23 x^4+32 x^3+9 x^2+15 x$
  • $y^2=5 x^6+23 x^5+5 x^4+22 x^3+41 x^2+6 x+21$
  • $y^2=15 x^6+26 x^5+15 x^4+23 x^3+37 x^2+18 x+20$
  • $y^2=37 x^6+29 x^5+24 x^4+19 x^2+25 x+8$
  • $y^2=25 x^6+x^5+29 x^4+14 x^2+32 x+24$
  • $y^2=24 x^6+42 x^5+4 x^4+23 x^3+12 x^2+4 x+28$
  • $y^2=29 x^6+17 x^5+32 x^4+36 x^3+31 x^2+x+42$
  • $y^2=x^6+8 x^5+10 x^4+22 x^3+7 x^2+3 x+40$
  • $y^2=29 x^6+41 x^5+35 x^4+13 x^3+12 x^2+32 x+4$
  • $y^2=x^6+37 x^5+19 x^4+39 x^3+36 x^2+10 x+12$
  • $y^2=8 x^6+17 x^5+20 x^4+25 x^3+8 x^2+8 x+35$
  • $y^2=24 x^6+8 x^5+17 x^4+32 x^3+24 x^2+24 x+19$
  • $y^2=x^6+42$
  • $y^2=27 x^5+30 x^3+3 x$
  • $y^2=7 x^6+23 x^5+28 x^4+42 x^3+28 x^2+26 x+19$
  • $y^2=21 x^6+26 x^5+41 x^4+40 x^3+41 x^2+35 x+14$
  • and 280 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{43^{2}}$.

Endomorphism algebra over $\F_{43}$
The isogeny class factors as 1.43.ai $\times$ 1.43.i and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:
Endomorphism algebra over $\overline{\F}_{43}$
The base change of $A$ to $\F_{43^{2}}$ is 1.1849.w 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
2.43.aq_fu$2$(not in LMFDB)
2.43.q_fu$2$(not in LMFDB)
2.43.av_hi$3$(not in LMFDB)
2.43.as_fv$3$(not in LMFDB)
2.43.ad_bu$3$(not in LMFDB)
2.43.a_adf$3$(not in LMFDB)
2.43.a_cj$3$(not in LMFDB)
2.43.d_bu$3$(not in LMFDB)
2.43.s_fv$3$(not in LMFDB)
2.43.v_hi$3$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.43.aq_fu$2$(not in LMFDB)
2.43.q_fu$2$(not in LMFDB)
2.43.av_hi$3$(not in LMFDB)
2.43.as_fv$3$(not in LMFDB)
2.43.ad_bu$3$(not in LMFDB)
2.43.a_adf$3$(not in LMFDB)
2.43.a_cj$3$(not in LMFDB)
2.43.d_bu$3$(not in LMFDB)
2.43.s_fv$3$(not in LMFDB)
2.43.v_hi$3$(not in LMFDB)
2.43.a_aw$4$(not in LMFDB)
2.43.aba_jv$6$(not in LMFDB)
2.43.an_ew$6$(not in LMFDB)
2.43.ak_eh$6$(not in LMFDB)
2.43.ai_v$6$(not in LMFDB)
2.43.af_as$6$(not in LMFDB)
2.43.f_as$6$(not in LMFDB)
2.43.i_v$6$(not in LMFDB)
2.43.k_eh$6$(not in LMFDB)
2.43.n_ew$6$(not in LMFDB)
2.43.s_fv$6$(not in LMFDB)
2.43.ba_jv$6$(not in LMFDB)
2.43.a_acj$12$(not in LMFDB)
2.43.a_df$12$(not in LMFDB)