Properties

Label 3.5.ah_ba_acp
Base field $\F_{5}$
Dimension $3$
$p$-rank $3$
Ordinary yes
Supersingular no
Simple no
Geometrically simple no
Primitive yes
Principally polarizable yes
Contains a Jacobian no

Related objects

Downloads

Learn more

Invariants

Base field:  $\F_{5}$
Dimension:  $3$
L-polynomial:  $( 1 - 3 x + 5 x^{2} )( 1 - 4 x + 9 x^{2} - 20 x^{3} + 25 x^{4} )$
  $1 - 7 x + 26 x^{2} - 67 x^{3} + 130 x^{4} - 175 x^{5} + 125 x^{6}$
Frobenius angles:  $\pm0.103885594917$, $\pm0.265942140215$, $\pm0.516810247272$
Angle rank:  $3$ (numerical)
Jacobians:  $0$
Isomorphism classes:  16

This isogeny class is not simple, primitive, ordinary, and not supersingular. It is principally polarizable.

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

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $33$ $17523$ $2002176$ $238750875$ $31462716813$

Point counts of the (virtual) curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $-1$ $29$ $128$ $613$ $3219$ $15884$ $77783$ $389413$ $1956224$ $9780229$

Jacobians and polarizations

This isogeny class is principally polarizable, but does not contain a Jacobian.

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{5}$.

Endomorphism algebra over $\F_{5}$
The isogeny class factors as 1.5.ad $\times$ 2.5.ae_j 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 is a list of all twists of this isogeny class.

TwistExtension degreeCommon base change
3.5.ab_c_an$2$3.25.d_ac_ct
3.5.b_c_n$2$3.25.d_ac_ct
3.5.h_ba_cp$2$3.25.d_ac_ct