Abelian variety isogeny class 1.83.g over $\F_{83}$

• Label: 1.83.g
• Base field: $\F_{83}$
• Dimension: $1$
• $p$-rank: $1$
• Ordinary: yes
• Supersingular: no
• Simple: yes
• Geometrically simple: yes
• Primitive: yes
• Principally polarizable: yes
• Contains a Jacobian: yes

Invariants

Base field:	$\F_{83}$
Dimension:	$1$
L-polynomial:	$1 + 6 x + 83 x^{2}$
Frobenius angles:	$\pm0.606810309697$
Angle rank:	$1$ (numerical)
Number field:	\(\Q(\sqrt{-74}) \)
Galois group:	$C_2$
Jacobians:	$10$
Isomorphism classes:	10

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:	$1$
Slopes:	$[0, 1]$

Point counts

Point counts of the abelian variety

$r$	$1$	$2$	$3$	$4$	$5$
$A(\F_{q^r})$	$90$	$7020$	$570510$	$47455200$	$3939165450$

Point counts of the curve

$r$	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$8$	$9$	$10$
$C(\F_{q^r})$	$90$	$7020$	$570510$	$47455200$	$3939165450$	$326939883660$	$27136043568990$	$2252292317308800$	$186940255372434810$	$15516041179507397100$

Jacobians and polarizations

This isogeny class is principally polarizable and contains the Jacobians of 10 curves (of which 0 are hyperelliptic):

• $y^2=x^3+39 x+39$
• $y^2=x^3+6 x+12$
• $y^2=x^3+10 x+20$
• $y^2=x^3+42 x+42$
• $y^2=x^3+8 x+8$
• $y^2=x^3+36 x+72$
• $y^2=x^3+55 x+55$
• $y^2=x^3+42 x+1$
• $y^2=x^3+65 x+47$
• $y^2=x^3+x+1$

Decomposition and endomorphism algebra

All geometric endomorphisms are defined over $\F_{83}$.

Endomorphism algebra over $\F_{83}$

The endomorphism algebra of this simple isogeny class is \(\Q(\sqrt{-74}) \).

Base change

This is a primitive isogeny class.

Twists

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

Twist	Extension degree	Common base change
1.83.ag	$2$	(not in LMFDB)