Properties

Label 2.53.am_fa
Base field $\F_{53}$
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:  $\F_{53}$
Dimension:  $2$
L-polynomial:  $1 - 12 x + 130 x^{2} - 636 x^{3} + 2809 x^{4}$
Frobenius angles:  $\pm0.274770064888$, $\pm0.444276996108$
Angle rank:  $2$ (numerical)
Number field:  \(\Q(\sqrt{-8 -2 \sqrt{3}})\)
Galois group:  $D_{4}$
Jacobians:  $154$
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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $2292$ $8223696$ $22320341748$ $62267984004096$ $174880941838108692$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $42$ $2926$ $149922$ $7891534$ $418179882$ $22164375166$ $1174711074306$ $62259674915998$ $3299763467157930$ $174887470803074446$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 154 curves (of which all are hyperelliptic):

  • $y^2=35 x^6+33 x^5+8 x^4+29 x^3+28 x^2+27 x+49$
  • $y^2=31 x^6+32 x^5+25 x^4+38 x^3+44 x^2+46 x+14$
  • $y^2=14 x^6+13 x^5+6 x^4+27 x^3+24 x^2+7 x+48$
  • $y^2=30 x^6+48 x^5+37 x^4+6 x^3+43 x^2+39 x+31$
  • $y^2=35 x^6+6 x^5+44 x^4+25 x^3+51 x^2+x+26$
  • $y^2=20 x^6+41 x^5+7 x^4+18 x^3+2 x^2+52 x+28$
  • $y^2=48 x^6+50 x^5+37 x^4+17 x^3+40 x^2+50 x+9$
  • $y^2=47 x^6+2 x^5+16 x^4+4 x^3+33 x^2+22 x+33$
  • $y^2=3 x^5+3 x^4+22 x^3+17 x^2+23 x+14$
  • $y^2=30 x^6+16 x^5+20 x^4+52 x^3+27 x^2+13 x+24$
  • $y^2=9 x^6+24 x^5+x^4+47 x^3+33 x^2+18 x+38$
  • $y^2=9 x^6+8 x^5+36 x^4+8 x^3+49 x^2+15 x+8$
  • $y^2=17 x^6+28 x^5+49 x^3+33 x^2+32 x+11$
  • $y^2=5 x^6+24 x^5+13 x^4+19 x^3+10 x^2+14 x+23$
  • $y^2=18 x^6+52 x^5+6 x^4+19 x^3+44 x^2+4 x+15$
  • $y^2=26 x^6+37 x^5+44 x^4+36 x^3+x^2+49 x+38$
  • $y^2=16 x^6+18 x^5+27 x^4+51 x^3+51 x^2+x+41$
  • $y^2=20 x^6+19 x^5+5 x^4+24 x^3+29 x^2+24 x+35$
  • $y^2=18 x^6+43 x^5+19 x^4+39 x^3+8 x^2+15 x+37$
  • $y^2=18 x^6+4 x^5+40 x^3+17 x^2+21 x+45$
  • and 134 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{53}$.

Endomorphism algebra over $\F_{53}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-8 -2 \sqrt{3}})\).

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.53.m_fa$2$(not in LMFDB)