Properties

Label 2.59.a_ba
Base field $\F_{59}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple yes
Geometrically simple no
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

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Invariants

Base field:  $\F_{59}$
Dimension:  $2$
L-polynomial:  $1 + 26 x^{2} + 3481 x^{4}$
Frobenius angles:  $\pm0.285358177425$, $\pm0.714641822575$
Angle rank:  $1$ (numerical)
Number field:  \(\Q(i, \sqrt{23})\)
Galois group:  $C_2^2$
Jacobians:  $399$
Cyclic group of points:    no
Non-cyclic primes:   $2$

This isogeny class is simple but not 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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $3508$ $12306064$ $42180279700$ $146982840827904$ $511116754581869428$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $60$ $3534$ $205380$ $12129934$ $714924300$ $42180025758$ $2488651484820$ $146830407046174$ $8662995818654940$ $511116755863097454$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 399 curves (of which all are hyperelliptic):

  • $y^2=41 x^6+35 x^5+35 x^4+47 x^3+2 x^2+9 x+58$
  • $y^2=23 x^6+11 x^5+11 x^4+35 x^3+4 x^2+18 x+57$
  • $y^2=30 x^6+46 x^5+54 x^4+30 x^3+30 x^2+31 x+29$
  • $y^2=x^6+33 x^5+49 x^4+x^3+x^2+3 x+58$
  • $y^2=36 x^6+40 x^5+29 x^3+40 x^2+x+6$
  • $y^2=13 x^6+21 x^5+58 x^3+21 x^2+2 x+12$
  • $y^2=10 x^6+39 x^5+29 x^4+14 x^3+44 x^2+43 x+16$
  • $y^2=20 x^6+19 x^5+58 x^4+28 x^3+29 x^2+27 x+32$
  • $y^2=58 x^6+29 x^5+56 x^4+12 x^3+6 x^2+22 x+58$
  • $y^2=57 x^6+58 x^5+53 x^4+24 x^3+12 x^2+44 x+57$
  • $y^2=26 x^6+4 x^5+x^4+32 x^3+47 x^2+45 x+30$
  • $y^2=50 x^6+3 x^5+18 x^4+36 x^3+52 x^2+23 x+27$
  • $y^2=41 x^6+6 x^5+36 x^4+13 x^3+45 x^2+46 x+54$
  • $y^2=25 x^6+11 x^5+40 x^4+9 x^3+10 x^2+42 x+15$
  • $y^2=50 x^6+22 x^5+21 x^4+18 x^3+20 x^2+25 x+30$
  • $y^2=25 x^6+22 x^5+46 x^4+41 x^3+39 x^2+30 x+50$
  • $y^2=50 x^6+44 x^5+33 x^4+23 x^3+19 x^2+x+41$
  • $y^2=20 x^6+18 x^4+57 x^3+30 x^2+19 x+42$
  • $y^2=40 x^6+36 x^4+55 x^3+x^2+38 x+25$
  • $y^2=56 x^6+12 x^5+11 x^4+48 x^3+9 x^2+57 x+41$
  • and 379 more

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{59^{2}}$.

Endomorphism algebra over $\F_{59}$
The endomorphism algebra of this simple isogeny class is \(\Q(i, \sqrt{23})\).
Endomorphism algebra over $\overline{\F}_{59}$
The base change of $A$ to $\F_{59^{2}}$ is 1.3481.ba 2 and its endomorphism algebra is $\mathrm{M}_{2}($\(\Q(\sqrt{-23}) \)$)$

Base change

This is a primitive isogeny class.

Twists

Below are some of the twists of this isogeny class.

TwistExtension degreeCommon base change
2.59.ay_kc$4$(not in LMFDB)
2.59.a_aba$4$(not in LMFDB)
2.59.y_kc$4$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.59.ay_kc$4$(not in LMFDB)
2.59.a_aba$4$(not in LMFDB)
2.59.y_kc$4$(not in LMFDB)
2.59.am_dh$12$(not in LMFDB)
2.59.m_dh$12$(not in LMFDB)