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Properties

Label 40.96.1.bg.1
Level $40$
Index $96$
Genus $1$
Analytic rank $0$
Cusps $16$
$\Q$-cusps $0$

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Invariants

Level: $40$ $\SL_2$-level: $8$ Newform level: $64$
Index: $96$ $\PSL_2$-index:$96$
Genus: $1 = 1 + \frac{ 96 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 16 }{2}$
Cusps: $16$ (none of which are rational) Cusp widths $4^{8}\cdot8^{8}$ Cusp orbits $2^{4}\cdot4^{2}$
Elliptic points: $0$ of order $2$ and $0$ of order $3$
Analytic rank: $0$
$\Q$-gonality: $2$
$\overline{\Q}$-gonality: $2$
Rational cusps: $0$
Rational CM points: none

Other labels

Cummins and Pauli (CP) label: 8K1
Rouse, Sutherland, and Zureick-Brown (RSZB) label: 40.96.1.878

Level structure

$\GL_2(\Z/40\Z)$-generators: $\begin{bmatrix}1&36\\28&31\end{bmatrix}$, $\begin{bmatrix}9&32\\38&23\end{bmatrix}$, $\begin{bmatrix}15&36\\2&23\end{bmatrix}$, $\begin{bmatrix}23&4\\32&3\end{bmatrix}$
Contains $-I$: yes
Quadratic refinements: 40.192.1-40.bg.1.1, 40.192.1-40.bg.1.2, 40.192.1-40.bg.1.3, 40.192.1-40.bg.1.4, 40.192.1-40.bg.1.5, 40.192.1-40.bg.1.6, 40.192.1-40.bg.1.7, 40.192.1-40.bg.1.8, 120.192.1-40.bg.1.1, 120.192.1-40.bg.1.2, 120.192.1-40.bg.1.3, 120.192.1-40.bg.1.4, 120.192.1-40.bg.1.5, 120.192.1-40.bg.1.6, 120.192.1-40.bg.1.7, 120.192.1-40.bg.1.8, 280.192.1-40.bg.1.1, 280.192.1-40.bg.1.2, 280.192.1-40.bg.1.3, 280.192.1-40.bg.1.4, 280.192.1-40.bg.1.5, 280.192.1-40.bg.1.6, 280.192.1-40.bg.1.7, 280.192.1-40.bg.1.8
Cyclic 40-isogeny field degree: $12$
Cyclic 40-torsion field degree: $96$
Full 40-torsion field degree: $7680$

Jacobian

Conductor: $2^{6}$
Simple: yes
Squarefree: yes
Decomposition: $1$
Newforms: 64.2.a.a

Models

Embedded model Embedded model in $\mathbb{P}^{3}$

$ 0 $ $=$ $ 5 x^{2} + y^{2} - 2 w^{2} $
$=$ $2 y^{2} + 5 z^{2} - 2 w^{2}$
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Rational points

This modular curve has real points and $\Q_p$ points for $p$ not dividing the level, but no known rational points.

Maps to other modular curves

$j$-invariant map of degree 96 from the embedded model of this modular curve to the modular curve $X(1)$ :

$\displaystyle j$ $=$ $\displaystyle \frac{2^4}{5^4}\cdot\frac{(625z^{8}-100z^{4}w^{4}+16w^{8})^{3}}{w^{8}z^{8}(5z^{2}-2w^{2})^{2}(5z^{2}+2w^{2})^{2}}$

Modular covers

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Cover information

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This modular curve minimally covers the modular curves listed below.

Covered curve Level Index Degree Genus Rank Kernel decomposition
8.48.1.n.1 $8$ $2$ $2$ $1$ $0$ dimension zero
40.48.0.k.2 $40$ $2$ $2$ $0$ $0$ full Jacobian
40.48.0.l.1 $40$ $2$ $2$ $0$ $0$ full Jacobian
40.48.0.s.2 $40$ $2$ $2$ $0$ $0$ full Jacobian
40.48.0.t.1 $40$ $2$ $2$ $0$ $0$ full Jacobian
40.48.1.u.1 $40$ $2$ $2$ $1$ $0$ dimension zero
40.48.1.x.1 $40$ $2$ $2$ $1$ $0$ dimension zero

This modular curve is minimally covered by the modular curves in the database listed below.

Covering curve Level Index Degree Genus Rank Kernel decomposition
40.480.33.dg.1 $40$ $5$ $5$ $33$ $5$ $1^{14}\cdot2^{9}$
40.576.33.ko.2 $40$ $6$ $6$ $33$ $3$ $1^{14}\cdot2\cdot4^{4}$
40.960.65.oo.1 $40$ $10$ $10$ $65$ $9$ $1^{28}\cdot2^{10}\cdot4^{4}$
120.288.17.ccg.1 $120$ $3$ $3$ $17$ $?$ not computed
120.384.17.wc.2 $120$ $4$ $4$ $17$ $?$ not computed