Properties

Label 2.83.ag_dw
Base field $\F_{83}$
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:  $\F_{83}$
Dimension:  $2$
L-polynomial:  $1 - 6 x + 100 x^{2} - 498 x^{3} + 6889 x^{4}$
Frobenius angles:  $\pm0.278959365990$, $\pm0.600545632498$
Angle rank:  $2$ (numerical)
Number field:  \(\Q(\sqrt{-248 -30 \sqrt{3}})\)
Galois group:  $D_{4}$
Jacobians:  $440$
Cyclic group of points:    yes

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $6486$ $48606084$ $326991359214$ $2252705540461776$ $15516696081460183566$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $78$ $7054$ $571878$ $47467030$ $3939206898$ $326939415118$ $27136032331290$ $2252292238819294$ $186940255550922414$ $15516041185547666014$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 440 curves (of which all are hyperelliptic):

  • $y^2=58 x^6+44 x^5+51 x^4+16 x^3+74 x^2+45$
  • $y^2=33 x^6+77 x^5+62 x^4+59 x^3+68 x^2+69 x+46$
  • $y^2=10 x^6+40 x^5+3 x^4+71 x^3+31 x^2+70 x+37$
  • $y^2=79 x^6+21 x^5+63 x^4+14 x^3+39 x^2+66 x+38$
  • $y^2=13 x^6+49 x^5+44 x^4+37 x^3+x^2+71 x+51$
  • $y^2=14 x^6+58 x^5+55 x^4+32 x^3+15 x^2+61 x+25$
  • $y^2=30 x^6+25 x^5+43 x^4+53 x^3+22 x^2+81 x+49$
  • $y^2=9 x^6+13 x^5+32 x^4+78 x^3+24 x^2+41 x+16$
  • $y^2=82 x^6+38 x^5+23 x^4+50 x^3+x^2+34 x+75$
  • $y^2=2 x^6+77 x^5+11 x^4+67 x^3+72 x^2+29 x+59$
  • $y^2=59 x^6+59 x^5+67 x^4+31 x^3+54 x^2+25 x+58$
  • $y^2=54 x^6+3 x^5+4 x^4+54 x^3+40 x^2+30 x+22$
  • $y^2=78 x^6+81 x^5+30 x^4+76 x^2+66 x+24$
  • $y^2=3 x^6+56 x^5+49 x^4+10 x^3+59 x^2+41 x+44$
  • $y^2=26 x^6+x^5+59 x^4+77 x^3+6 x^2+45 x+34$
  • $y^2=26 x^6+64 x^5+61 x^4+x^3+23 x^2+74 x+52$
  • $y^2=25 x^6+69 x^5+7 x^4+61 x^3+59 x^2+14 x+57$
  • $y^2=50 x^6+29 x^5+x^4+61 x^3+8 x^2+16 x+70$
  • $y^2=33 x^6+54 x^5+43 x^4+30 x^3+67 x^2+45 x+43$
  • $y^2=71 x^6+68 x^5+50 x^4+29 x^3+45 x^2+33 x+4$
  • and 420 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{83}$.

Endomorphism algebra over $\F_{83}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-248 -30 \sqrt{3}})\).

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.83.g_dw$2$(not in LMFDB)