Properties

Label 2.89.ae_aw
Base field $\F_{89}$
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:  $\F_{89}$
Dimension:  $2$
L-polynomial:  $1 - 4 x - 22 x^{2} - 356 x^{3} + 7921 x^{4}$
Frobenius angles:  $\pm0.168589219160$, $\pm0.725646076070$
Angle rank:  $2$ (numerical)
Number field:  \(\Q(\sqrt{-37 +2 \sqrt{51}})\)
Galois group:  $D_{4}$
Jacobians:  $364$
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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $7540$ $62280400$ $495998519380$ $3938054463616000$ $31182127770788031700$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $86$ $7862$ $703574$ $62765598$ $5584132486$ $496982075222$ $44231359011814$ $3936588760418878$ $350356403757589046$ $31181719931543642102$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 364 curves (of which all are hyperelliptic):

  • $y^2=43 x^6+28 x^5+14 x^4+24 x^3+32 x^2+58 x+85$
  • $y^2=2 x^6+81 x^5+76 x^4+78 x^3+35 x^2+39 x+40$
  • $y^2=85 x^6+58 x^5+51 x^4+3 x^3+46 x^2+18 x+5$
  • $y^2=12 x^6+11 x^5+78 x^4+2 x^3+52 x^2+26 x+88$
  • $y^2=58 x^6+44 x^5+44 x^4+3 x^3+88 x^2+74 x+64$
  • $y^2=73 x^6+15 x^5+14 x^4+2 x^3+25 x^2+81 x+4$
  • $y^2=30 x^6+2 x^5+18 x^4+26 x^3+x^2+73 x+56$
  • $y^2=30 x^6+2 x^5+80 x^4+8 x^3+42 x^2+63 x+76$
  • $y^2=55 x^6+32 x^5+63 x^4+56 x^3+80 x^2+30 x+51$
  • $y^2=45 x^6+65 x^5+77 x^4+18 x^3+35 x^2+5 x+58$
  • $y^2=5 x^6+88 x^5+82 x^4+3 x^3+79 x^2+72 x+13$
  • $y^2=66 x^6+5 x^5+72 x^4+24 x^3+40 x^2+49 x+34$
  • $y^2=46 x^6+32 x^5+63 x^4+x^3+25 x^2+70 x+51$
  • $y^2=83 x^6+6 x^5+15 x^4+7 x^3+76 x^2+50 x+9$
  • $y^2=47 x^6+32 x^5+11 x^4+70 x^3+71 x^2+80 x+85$
  • $y^2=69 x^6+49 x^5+67 x^4+15 x^3+77 x^2+81 x+62$
  • $y^2=79 x^6+80 x^5+75 x^4+51 x^3+75 x^2+31 x+68$
  • $y^2=2 x^6+3 x^5+25 x^4+20 x^3+12 x^2+46 x+73$
  • $y^2=10 x^6+41 x^5+77 x^4+8 x^3+28 x^2+11 x+38$
  • $y^2=31 x^6+19 x^5+65 x^4+49 x^3+8 x^2+56 x+12$
  • and 344 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{89}$.

Endomorphism algebra over $\F_{89}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-37 +2 \sqrt{51}})\).

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.89.e_aw$2$(not in LMFDB)