Properties

Label 1.367.a
Base field $\F_{367}$
Dimension $1$
$p$-rank $0$
Ordinary no
Supersingular yes
Simple yes
Geometrically simple yes
Primitive yes
Principally polarizable yes
Contains a Jacobian yes

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Invariants

Base field:  $\F_{367}$
Dimension:  $1$
L-polynomial:  $1 + 367 x^{2}$
Frobenius angles:  $\pm0.5$
Angle rank:  $0$ (numerical)
Number field:  \(\Q(\sqrt{-367}) \)
Galois group:  $C_2$
Jacobians:  $18$

This isogeny class is simple and geometrically simple, primitive, not ordinary, and supersingular. It is principally polarizable and contains a Jacobian.

Newton polygon

This isogeny class is supersingular.

$p$-rank:  $0$
Slopes:  $[1/2, 1/2]$

Point counts

Point counts of the abelian variety

$r$ $1$ $2$ $3$ $4$ $5$
$A(\F_{q^r})$ $368$ $135424$ $49430864$ $18140857344$ $6657793506608$

Point counts of the curve

$r$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$
$C(\F_{q^r})$ $368$ $135424$ $49430864$ $18140857344$ $6657793506608$ $2443410315786496$ $896731549611390224$ $329100478671097958400$ $120779875685608537745648$ $44326214376631648939665664$

Jacobians and polarizations

This isogeny class contains the Jacobians of 18 curves (of which all are hyperelliptic), and hence is principally polarizable:

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{367^{2}}$.

Endomorphism algebra over $\F_{367}$
The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-367}) \).
Endomorphism algebra over $\overline{\F}_{367}$
The base change of $A$ to $\F_{367^{2}}$ is the simple isogeny class 1.134689.bcg and its endomorphism algebra is the quaternion algebra over \(\Q\) ramified at $367$ and $\infty$.

Base change

This is a primitive isogeny class.

Twists

This isogeny class has no twists.