Properties

Label 3.19.i_cf_km
Base field $\F_{19}$
Dimension $3$
$p$-rank $3$
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:  $\F_{19}$
Dimension:  $3$
L-polynomial:  $1 + 8 x + 57 x^{2} + 272 x^{3} + 1083 x^{4} + 2888 x^{5} + 6859 x^{6}$
Frobenius angles:  $\pm0.433561326858$, $\pm0.588316326410$, $\pm0.823982815866$
Angle rank:  $3$ (numerical)
Number field:  6.0.5870272.1
Galois group:  $S_4\times C_2$
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:  $3$
Slopes:  $[0, 0, 0, 1, 1, 1]$

Point counts

Point counts of the abelian variety

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $11168$ $53963776$ $320867618144$ $2206988925337600$ $15165475402110875168$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $28$ $412$ $6820$ $129948$ $2473548$ $47062396$ $893830868$ $16983820476$ $322687594492$ $6131055578332$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 219 hyperelliptic curves, but it is unknown how many Jacobians of non-hyperelliptic curves it contains:

  • $y^2=x^7+x^6+9 x^4+11 x^3+16 x$
  • $y^2=x^7+x^6+10 x^5+18 x^4+11 x^3+15 x^2+x$
  • $y^2=x^7+14 x^6+16 x^5+9 x^4+15 x^3+10 x^2+11 x$
  • $y^2=x^7+18 x^6+6 x^5+2 x^4+16 x^3+16 x^2+17 x$
  • $y^2=18 x^7+17 x^6+12 x^5+13 x^4+7 x^3+16 x^2+12 x$
  • $y^2=x^7+3 x^6+3 x^5+11 x^4+18 x^3+6 x^2+8 x+7$
  • $y^2=18 x^7+11 x^6+14 x^5+6 x^4+11 x^3+10 x^2+9 x+4$
  • $y^2=x^8+16 x^6+5 x^5+5 x^4+6 x^3+3 x^2+5 x+6$
  • $y^2=18 x^8+17 x^7+18 x^6+7 x^5+14 x^4+2 x^3+15 x^2+18 x+14$
  • $y^2=x^7+9 x^6+9 x^5+8 x^4+17 x^3+15 x^2+17 x+4$
  • $y^2=x^8+9 x^6+2 x^5+8 x^4+9 x^2+2 x+7$
  • $y^2=x^8+x^7+14 x^6+5 x^5+7 x^4+x^3+14 x^2+5 x+6$
  • $y^2=18 x^7+15 x^6+3 x^5+10 x^4+17 x^3+4 x^2+16 x+5$
  • $y^2=18 x^8+5 x^7+7 x^5+11 x^4+10 x^3+16 x^2+x+6$
  • $y^2=x^8+2 x^7+10 x^6+7 x^5+17 x^4+17 x^3+12 x^2+18 x+11$
  • $y^2=x^8+6 x^7+5 x^6+7 x^5+11 x^4+14 x^3+6 x^2+2 x+6$
  • $y^2=x^8+14 x^7+15 x^6+4 x^5+12 x^4+15 x^3+12 x^2+5 x+5$
  • $y^2=x^8+10 x^7+13 x^6+12 x^5+6 x^4+4 x^3+18 x^2+5 x$
  • $y^2=18 x^8+14 x^7+10 x^6+4 x^5+12 x^4+5 x^3+5 x^2+17 x$
  • $y^2=x^8+10 x^7+5 x^6+4 x^5+13 x^4+6 x^3+4 x^2+16 x+5$
  • and 199 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{19}$.

Endomorphism algebra over $\F_{19}$
The endomorphism algebra of this simple isogeny class is 6.0.5870272.1.

Base change

This is a primitive isogeny class.

Twists

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

TwistExtension degreeCommon base change
3.19.ai_cf_akm$2$(not in LMFDB)