Properties

Label 2.73.ag_fb
Base field $\F_{73}$
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:  $\F_{73}$
Dimension:  $2$
L-polynomial:  $1 - 6 x + 131 x^{2} - 438 x^{3} + 5329 x^{4}$
Frobenius angles:  $\pm0.347041260868$, $\pm0.535446793404$
Angle rank:  $2$ (numerical)
Number field:  \(\Q(\sqrt{-259 +12 \sqrt{6}})\)
Galois group:  $D_{4}$
Jacobians:  $108$
Isomorphism classes:  180
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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $5017$ $29625385$ $151656605248$ $806291143871625$ $4297598453914840297$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $68$ $5556$ $389846$ $28392292$ $2073058388$ $151334084814$ $11047392381716$ $806460099526468$ $58871587566467558$ $4297625831918665236$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 108 curves (of which all are hyperelliptic):

  • $y^2=42 x^6+31 x^5+32 x^4+13 x^3+19 x^2+68 x+45$
  • $y^2=28 x^6+51 x^5+35 x^4+13 x^3+65 x^2+53 x+43$
  • $y^2=47 x^6+19 x^5+12 x^4+50 x^3+38 x^2+33 x+29$
  • $y^2=56 x^6+39 x^5+13 x^4+13 x^3+10 x^2+13 x+62$
  • $y^2=27 x^6+72 x^5+37 x^4+8 x^2+69 x+67$
  • $y^2=42 x^6+60 x^5+32 x^4+29 x^3+55 x^2+9 x+11$
  • $y^2=61 x^6+72 x^5+21 x^4+10 x^3+55 x^2+61 x+32$
  • $y^2=52 x^6+47 x^5+34 x^4+37 x^3+48 x^2+3 x+69$
  • $y^2=21 x^6+14 x^5+22 x^4+66 x^3+26 x^2+37 x+27$
  • $y^2=70 x^6+43 x^5+15 x^4+31 x^3+30 x^2+51 x+3$
  • $y^2=24 x^6+13 x^5+38 x^4+23 x^3+4 x^2+13 x+58$
  • $y^2=16 x^6+25 x^5+12 x^4+16 x^3+67 x^2+51 x+17$
  • $y^2=15 x^6+57 x^5+41 x^4+25 x^3+53 x^2+3 x+40$
  • $y^2=15 x^6+29 x^5+2 x^4+47 x^3+55 x^2+26 x+7$
  • $y^2=4 x^6+13 x^5+30 x^4+49 x^3+47 x^2+38 x+28$
  • $y^2=51 x^6+25 x^5+65 x^4+52 x^3+38 x^2+59 x+18$
  • $y^2=45 x^6+49 x^5+24 x^4+56 x^3+47 x+40$
  • $y^2=45 x^6+41 x^5+50 x^4+67 x^3+48 x^2+x+65$
  • $y^2=24 x^6+23 x^5+56 x^4+32 x^3+48 x^2+2 x+6$
  • $y^2=10 x^6+67 x^5+26 x^4+13 x^3+25 x^2+51 x+11$
  • and 88 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{73}$.

Endomorphism algebra over $\F_{73}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-259 +12 \sqrt{6}})\).

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
2.73.g_fb$2$(not in LMFDB)