Properties

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

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Invariants

Level: $40$ $\SL_2$-level: $8$ Newform level: $800$
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 $2^{2}\cdot4^{3}$
Elliptic points: $0$ of order $2$ and $0$ of order $3$
Analytic rank: $1$
$\Q$-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: 40.96.1.632

Level structure

$\GL_2(\Z/40\Z)$-generators: $\begin{bmatrix}5&26\\36&7\end{bmatrix}$, $\begin{bmatrix}17&32\\28&21\end{bmatrix}$, $\begin{bmatrix}39&30\\1&37\end{bmatrix}$
Contains $-I$: yes
Quadratic refinements: none in database
Cyclic 40-isogeny field degree: $12$
Cyclic 40-torsion field degree: $192$
Full 40-torsion field degree: $7680$

Jacobian

Conductor: $2^{5}\cdot5^{2}$
Simple: yes
Squarefree: yes
Decomposition: $1$
Newforms: 800.2.a.d

Models

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

$ 0 $ $=$ $ y^{2} + 2 y z - z^{2} + w^{2} $
$=$ $5 x^{2} - y^{2} + 2 y z + z^{2}$
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Singular plane model Singular plane model

$ 0 $ $=$ $ x^{4} - 10 x^{2} y^{2} + 2 x^{2} z^{2} - 25 y^{4} - 10 y^{2} z^{2} - z^{4} $
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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 between models of this curve

Birational map from embedded model to plane model:

$\displaystyle X$ $=$ $\displaystyle y$
$\displaystyle Y$ $=$ $\displaystyle \frac{1}{2}x$
$\displaystyle Z$ $=$ $\displaystyle \frac{1}{2}w$

Maps to other modular curves

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

$\displaystyle j$ $=$ $\displaystyle 2^2\,\frac{1532805120yz^{23}-1040670720yz^{21}w^{2}-468725760yz^{19}w^{4}+436582400yz^{17}w^{6}+7165952yz^{15}w^{8}-57977856yz^{13}w^{10}+8712704yz^{11}w^{12}+1975040yz^{9}w^{14}-645696yz^{7}w^{16}+61984yz^{5}w^{18}-2288yz^{3}w^{20}+24yzw^{22}-634908672z^{24}+972988416z^{22}w^{2}-106039296z^{20}w^{4}-375613440z^{18}w^{6}+124464896z^{16}w^{8}+38925312z^{14}w^{10}-21149440z^{12}w^{12}+521984z^{10}w^{14}+975600z^{8}w^{16}-176608z^{6}w^{18}+11512z^{4}w^{20}-264z^{2}w^{22}+w^{24}}{z^{4}(2z^{2}-w^{2})^{4}(221760yz^{11}-258176yz^{9}w^{2}+105920yz^{7}w^{4}-18192yz^{5}w^{6}+1196yz^{3}w^{8}-20yzw^{10}-91856z^{12}+185344z^{10}w^{2}-125352z^{8}w^{4}+36024z^{6}w^{6}-4333z^{4}w^{8}+174z^{2}w^{10}-w^{12})}$

Modular covers

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Cover information

Click on a modular curve in the diagram to see information about it.

This modular curve minimally covers the modular curves listed below.

Covered curve Level Index Degree Genus Rank Kernel decomposition
8.48.0.q.2 $8$ $2$ $2$ $0$ $0$ full Jacobian
40.48.0.bs.1 $40$ $2$ $2$ $0$ $0$ full Jacobian
40.48.1.hl.1 $40$ $2$ $2$ $1$ $1$ 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.dvz.2 $40$ $5$ $5$ $33$ $7$ $1^{14}\cdot2^{9}$
40.576.33.con.1 $40$ $6$ $6$ $33$ $4$ $1^{14}\cdot2\cdot4^{4}$
40.960.65.eav.2 $40$ $10$ $10$ $65$ $9$ $1^{28}\cdot2^{10}\cdot4^{4}$
120.288.17.ddcb.2 $120$ $3$ $3$ $17$ $?$ not computed
120.384.17.fkl.2 $120$ $4$ $4$ $17$ $?$ not computed