Properties

Label 2.79.o_hq
Base field $\F_{79}$
Dimension $2$
$p$-rank $2$
Ordinary yes
Supersingular no
Simple no
Geometrically simple no
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

Related objects

Downloads

Learn more

Invariants

Base field:  $\F_{79}$
Dimension:  $2$
L-polynomial:  $( 1 + 4 x + 79 x^{2} )( 1 + 10 x + 79 x^{2} )$
  $1 + 14 x + 198 x^{2} + 1106 x^{3} + 6241 x^{4}$
Frobenius angles:  $\pm0.572243955238$, $\pm0.690177289346$
Angle rank:  $2$ (numerical)
Jacobians:  $322$

This isogeny class is not 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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $7560$ $40219200$ $241978340520$ $1517164750080000$ $9468637995407005800$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $94$ $6442$ $490786$ $38951518$ $3077174014$ $243086769322$ $19203907784386$ $1517108823555838$ $119851596054387934$ $9468276084531252202$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 322 curves (of which all are hyperelliptic):

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{79}$.

Endomorphism algebra over $\F_{79}$
The isogeny class factors as 1.79.e $\times$ 1.79.k and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is:

Base change

This is a primitive isogeny class.

Twists

Below are some of the twists of this isogeny class.

TwistExtension degreeCommon base change
2.79.ao_hq$2$(not in LMFDB)
2.79.ag_eo$2$(not in LMFDB)
2.79.g_eo$2$(not in LMFDB)
2.79.ah_am$3$(not in LMFDB)
2.79.x_lc$3$(not in LMFDB)

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

TwistExtension degreeCommon base change
2.79.ao_hq$2$(not in LMFDB)
2.79.ag_eo$2$(not in LMFDB)
2.79.g_eo$2$(not in LMFDB)
2.79.ah_am$3$(not in LMFDB)
2.79.x_lc$3$(not in LMFDB)
2.79.abb_mq$6$(not in LMFDB)
2.79.ax_lc$6$(not in LMFDB)
2.79.ad_bc$6$(not in LMFDB)
2.79.d_bc$6$(not in LMFDB)
2.79.h_am$6$(not in LMFDB)
2.79.bb_mq$6$(not in LMFDB)