Properties

Label 2.47.g_dq
Base field $\F_{47}$
Dimension $2$
$p$-rank $1$
Ordinary no
Supersingular no
Simple no
Geometrically simple no
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

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Invariants

Base field:  $\F_{47}$
Dimension:  $2$
L-polynomial:  $( 1 + 47 x^{2} )( 1 + 6 x + 47 x^{2} )$
  $1 + 6 x + 94 x^{2} + 282 x^{3} + 2209 x^{4}$
Frobenius angles:  $\pm0.5$, $\pm0.644169619151$
Angle rank:  $1$ (numerical)
Jacobians:  $180$
Cyclic group of points:    no
Non-cyclic primes:   $2, 3$

This isogeny class is not simple, primitive, not ordinary, and not supersingular. It is principally polarizable and contains a Jacobian.

Newton polygon

$p$-rank:  $1$
Slopes:  $[0, 1/2, 1/2, 1]$

Point counts

Point counts of the abelian variety

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $2592$ $5225472$ $10714013856$ $23794876514304$ $52604473222376352$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $54$ $2362$ $103194$ $4876318$ $229368294$ $10779233722$ $506623161546$ $23811285550846$ $1119130419281238$ $52599132610972282$

Jacobians and polarizations

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

  • $y^2=44 x^6+32 x^5+15 x^4+19 x^3+32 x^2+18 x+16$
  • $y^2=15 x^5+19 x^4+32 x^3+28 x^2+24 x+29$
  • $y^2=19 x^6+13 x^5+22 x^4+7 x^3+3 x^2+15 x+35$
  • $y^2=29 x^6+12 x^5+10 x^4+20 x^3+18 x^2+21 x+3$
  • $y^2=18 x^6+20 x^5+3 x^4+42 x^3+22 x^2+2 x+36$
  • $y^2=28 x^6+22 x^5+4 x^4+32 x^3+34 x^2+15 x+17$
  • $y^2=40 x^6+17 x^5+12 x^4+38 x^3+12 x^2+17 x+40$
  • $y^2=31 x^6+8 x^5+26 x^4+37 x^3+11 x^2+33 x+29$
  • $y^2=34 x^6+29 x^5+12 x^4+29 x^3+30 x^2+29 x+27$
  • $y^2=37 x^6+42 x^5+6 x^4+22 x^3+x^2+9 x+3$
  • $y^2=18 x^6+7 x^5+13 x^4+35 x^3+13 x^2+7 x+18$
  • $y^2=7 x^6+40 x^5+32 x^4+38 x^3+18 x^2+27 x+24$
  • $y^2=36 x^6+21 x^5+x^4+11 x^3+7 x^2+42 x+34$
  • $y^2=39 x^6+42 x^5+x^4+37 x^3+x^2+42 x+39$
  • $y^2=37 x^6+23 x^5+33 x^4+40 x^3+15 x^2+40 x+7$
  • $y^2=30 x^6+29 x^5+3 x^4+37 x^3+14 x^2+31 x+20$
  • $y^2=8 x^6+46 x^5+39 x^4+46 x^3+39 x^2+46 x+8$
  • $y^2=21 x^6+12 x^5+42 x^4+33 x^3+36 x^2+26 x+11$
  • $y^2=30 x^6+15 x^5+6 x^4+20 x^3+42 x^2+30 x+44$
  • $y^2=5 x^6+22 x^5+34 x^4+13 x^3+34 x^2+22 x+5$
  • and 160 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{47^{2}}$.

Endomorphism algebra over $\F_{47}$
The isogeny class factors as 1.47.a $\times$ 1.47.g 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 $\overline{\F}_{47}$
The base change of $A$ to $\F_{47^{2}}$ is 1.2209.cg $\times$ 1.2209.dq. The endomorphism algebra for each factor is:

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.47.ag_dq$2$(not in LMFDB)