Properties

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

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Invariants

Base field:  $\F_{43}$
Dimension:  $2$
L-polynomial:  $1 - 4 x + 42 x^{2} - 172 x^{3} + 1849 x^{4}$
Frobenius angles:  $\pm0.261645702182$, $\pm0.622622408574$
Angle rank:  $2$ (numerical)
Number field:  \(\Q(\sqrt{-24 +11 \sqrt{3}})\)
Galois group:  $D_{4}$
Jacobians:  $180$
Cyclic group of points:    no
Non-cyclic primes:   $2$

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $1716$ $3548688$ $6315252372$ $11700336620544$ $21616845199711476$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $40$ $1918$ $79432$ $3422350$ $147044920$ $6321221134$ $271817262232$ $11688200556190$ $502592577850312$ $21611482195633438$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 180 curves (of which all are hyperelliptic):

  • $y^2=23 x^6+40 x^5+2 x^4+6 x^3+4 x^2+6 x+25$
  • $y^2=37 x^6+4 x^5+26 x^4+4 x^3+22 x^2+34 x+35$
  • $y^2=7 x^6+35 x^5+39 x^4+2 x^3+21 x^2+2 x+42$
  • $y^2=32 x^6+7 x^5+27 x^4+11 x^3+13 x^2+17 x+38$
  • $y^2=37 x^6+x^5+6 x^4+26 x^3+7 x^2+3 x+18$
  • $y^2=11 x^6+36 x^5+22 x^4+18 x^3+39 x^2+30 x+34$
  • $y^2=32 x^6+22 x^5+19 x^4+41 x^3+26 x^2+35 x+4$
  • $y^2=5 x^6+25 x^5+41 x^4+31 x^3+18 x^2+33 x+7$
  • $y^2=36 x^6+9 x^5+22 x^4+12 x^3+27 x^2+36 x+18$
  • $y^2=42 x^6+30 x^5+29 x^4+36 x^3+22 x^2+16 x+27$
  • $y^2=36 x^6+28 x^5+23 x^3+40 x^2+16 x+27$
  • $y^2=25 x^6+22 x^5+2 x^4+15 x^3+30 x^2+29 x+18$
  • $y^2=42 x^5+41 x^4+23 x^3+7 x^2+5 x+30$
  • $y^2=35 x^6+38 x^5+15 x^4+39 x^3+20 x^2+27 x+3$
  • $y^2=11 x^6+35 x^5+19 x^4+39 x^3+24 x^2+17 x+29$
  • $y^2=19 x^6+3 x^4+25 x^3+36 x^2+26 x+30$
  • $y^2=8 x^6+9 x^5+35 x^4+3 x^3+9 x^2+4 x+18$
  • $y^2=18 x^6+36 x^5+2 x^4+24 x^3+21 x^2+41 x+34$
  • $y^2=5 x^6+42 x^5+8 x^4+25 x^3+7 x^2+31 x+41$
  • $y^2=17 x^6+36 x^5+x^4+32 x^3+6 x^2+14 x+10$
  • and 160 more

Decomposition and endomorphism algebra

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

Endomorphism algebra over $\F_{43}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-24 +11 \sqrt{3}})\).

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.43.e_bq$2$(not in LMFDB)