Invariants
| Level: | $40$ | $\SL_2$-level: | $20$ | Newform level: | $400$ | ||
| Index: | $240$ | $\PSL_2$-index: | $120$ | ||||
| Genus: | $7 = 1 + \frac{ 120 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 8 }{2}$ | ||||||
| Cusps: | $8$ (none of which are rational) | Cusp widths | $10^{4}\cdot20^{4}$ | Cusp orbits | $2^{2}\cdot4$ | ||
| Elliptic points: | $0$ of order $2$ and $0$ of order $3$ | ||||||
| Analytic rank: | $1$ | ||||||
| $\Q$-gonality: | $4$ | ||||||
| $\overline{\Q}$-gonality: | $4$ | ||||||
| Rational cusps: | $0$ | ||||||
| Rational CM points: | none |
Other labels
| Cummins and Pauli (CP) label: | 20B7 |
| Rouse, Sutherland, and Zureick-Brown (RSZB) label: | 40.240.7.729 |
Level structure
| $\GL_2(\Z/40\Z)$-generators: | $\begin{bmatrix}15&24\\14&35\end{bmatrix}$, $\begin{bmatrix}15&26\\14&29\end{bmatrix}$, $\begin{bmatrix}21&22\\38&39\end{bmatrix}$, $\begin{bmatrix}39&18\\14&11\end{bmatrix}$, $\begin{bmatrix}39&30\\26&31\end{bmatrix}$ |
| Contains $-I$: | no $\quad$ (see 20.120.7.h.1 for the level structure with $-I$) |
| Cyclic 40-isogeny field degree: | $24$ |
| Cyclic 40-torsion field degree: | $384$ |
| Full 40-torsion field degree: | $3072$ |
Jacobian
| Conductor: | $2^{20}\cdot5^{14}$ |
| Simple: | no |
| Squarefree: | no |
| Decomposition: | $1^{7}$ |
| Newforms: | 50.2.a.b$^{2}$, 100.2.a.a, 400.2.a.b, 400.2.a.d, 400.2.a.g, 400.2.a.h |
Models
Canonical model in $\mathbb{P}^{ 6 }$ defined by 10 equations
| $ 0 $ | $=$ | $ x w - x t + x u + y t - y u - y v + 2 z w + z u $ |
| $=$ | $2 x w + x u - y t + y u + y v - 2 z w - z t - z u - z v$ | |
| $=$ | $x w - x u + 2 x v - y t - y v + z t + z v$ | |
| $=$ | $x w + x t - 3 y w - y t + 2 y v - 2 z t - z u + z v$ | |
| $=$ | $\cdots$ |
Singular plane model Singular plane model
| $ 0 $ | $=$ | $ 25 x^{12} - 5050 x^{10} y^{2} - 350 x^{10} z^{2} + 239625 x^{8} y^{4} - 40000 x^{8} y^{2} z^{2} + \cdots + 13456 y^{4} z^{8} $ |
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
Map of degree 2 from the canonical model of this modular curve to the canonical model of the modular curve 10.60.3.a.1 :
| $\displaystyle X$ | $=$ | $\displaystyle -2x+y-3z$ |
| $\displaystyle Y$ | $=$ | $\displaystyle 4x-2y+z$ |
| $\displaystyle Z$ | $=$ | $\displaystyle x+2y-z$ |
Equation of the image curve:
| $0$ | $=$ | $ 2X^{4}-3X^{3}Y-5X^{2}Y^{2}-4XY^{3}-2Y^{4}+3X^{3}Z-18X^{2}YZ-17XY^{2}Z+4Y^{3}Z-5X^{2}Z^{2}+17XYZ^{2}-6Y^{2}Z^{2}+4XZ^{3}+4YZ^{3}-2Z^{4} $ |
Map of degree 1 from the canonical model of this modular curve to the plane model of the modular curve 20.120.7.h.1 :
| $\displaystyle X$ | $=$ | $\displaystyle x$ |
| $\displaystyle Y$ | $=$ | $\displaystyle \frac{1}{2}y+\frac{1}{2}z$ |
| $\displaystyle Z$ | $=$ | $\displaystyle \frac{1}{2}w$ |
Equation of the image curve:
| $0$ | $=$ | $ 25X^{12}-5050X^{10}Y^{2}-350X^{10}Z^{2}+239625X^{8}Y^{4}-40000X^{8}Y^{2}Z^{2}+935X^{8}Z^{4}+1556000X^{6}Y^{6}+21750X^{6}Y^{4}Z^{2}-21360X^{6}Y^{2}Z^{4}+2030X^{6}Z^{6}+2311000X^{4}Y^{8}-4370000X^{4}Y^{6}Z^{2}+468145X^{4}Y^{4}Z^{4}-23070X^{4}Y^{2}Z^{6}+841X^{4}Z^{8}-184800X^{2}Y^{10}-273000X^{2}Y^{8}Z^{2}+956820X^{2}Y^{6}Z^{4}+129760X^{2}Y^{4}Z^{6}-23548X^{2}Y^{2}Z^{8}+3600Y^{12}+3200Y^{10}Z^{2}+47200Y^{8}Z^{4}-132480Y^{6}Z^{6}+13456Y^{4}Z^{8} $ |
Modular covers
This modular curve minimally covers the modular curves listed below.
| Covered curve | Level | Index | Degree | Genus | Rank | Kernel decomposition |
|---|---|---|---|---|---|---|
| 40.120.3-10.a.1.2 | $40$ | $2$ | $2$ | $3$ | $0$ | $1^{4}$ |
| 40.120.3-10.a.1.4 | $40$ | $2$ | $2$ | $3$ | $0$ | $1^{4}$ |
This modular curve is minimally covered by the modular curves in the database listed below.
| Covering curve | Level | Index | Degree | Genus | Rank | Kernel decomposition |
|---|---|---|---|---|---|---|
| 40.480.13-20.a.1.4 | $40$ | $2$ | $2$ | $13$ | $3$ | $1^{6}$ |
| 40.480.13-40.c.1.3 | $40$ | $2$ | $2$ | $13$ | $7$ | $1^{6}$ |
| 40.480.13-20.d.1.14 | $40$ | $2$ | $2$ | $13$ | $3$ | $1^{6}$ |
| 40.480.13-40.l.1.8 | $40$ | $2$ | $2$ | $13$ | $1$ | $1^{6}$ |
| 40.480.13-20.m.1.4 | $40$ | $2$ | $2$ | $13$ | $2$ | $1^{6}$ |
| 40.480.13-20.p.1.4 | $40$ | $2$ | $2$ | $13$ | $1$ | $1^{6}$ |
| 40.480.13-40.bm.1.7 | $40$ | $2$ | $2$ | $13$ | $2$ | $1^{6}$ |
| 40.480.13-40.bv.1.1 | $40$ | $2$ | $2$ | $13$ | $6$ | $1^{6}$ |
| 40.480.15-20.j.1.2 | $40$ | $2$ | $2$ | $15$ | $4$ | $1^{8}$ |
| 40.480.15-20.j.1.4 | $40$ | $2$ | $2$ | $15$ | $4$ | $1^{8}$ |
| 40.480.15-20.k.1.6 | $40$ | $2$ | $2$ | $15$ | $2$ | $1^{8}$ |
| 40.480.15-20.k.1.11 | $40$ | $2$ | $2$ | $15$ | $2$ | $1^{8}$ |
| 40.480.15-20.m.1.4 | $40$ | $2$ | $2$ | $15$ | $3$ | $1^{8}$ |
| 40.480.15-20.m.1.5 | $40$ | $2$ | $2$ | $15$ | $3$ | $1^{8}$ |
| 40.480.15-20.o.1.2 | $40$ | $2$ | $2$ | $15$ | $2$ | $1^{8}$ |
| 40.480.15-20.o.1.8 | $40$ | $2$ | $2$ | $15$ | $2$ | $1^{8}$ |
| 40.480.15-40.bk.1.5 | $40$ | $2$ | $2$ | $15$ | $5$ | $1^{8}$ |
| 40.480.15-40.bk.1.11 | $40$ | $2$ | $2$ | $15$ | $5$ | $1^{8}$ |
| 40.480.15-40.bn.1.3 | $40$ | $2$ | $2$ | $15$ | $5$ | $1^{8}$ |
| 40.480.15-40.bn.1.13 | $40$ | $2$ | $2$ | $15$ | $5$ | $1^{8}$ |
| 40.480.15-40.bt.1.4 | $40$ | $2$ | $2$ | $15$ | $4$ | $1^{8}$ |
| 40.480.15-40.bt.1.14 | $40$ | $2$ | $2$ | $15$ | $4$ | $1^{8}$ |
| 40.480.15-40.bz.1.6 | $40$ | $2$ | $2$ | $15$ | $6$ | $1^{8}$ |
| 40.480.15-40.bz.1.12 | $40$ | $2$ | $2$ | $15$ | $6$ | $1^{8}$ |
| 40.720.19-20.t.1.5 | $40$ | $3$ | $3$ | $19$ | $3$ | $1^{12}$ |
| 120.480.13-60.i.1.7 | $120$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 120.480.13-60.l.1.2 | $120$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 120.480.13-120.ba.1.5 | $120$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 120.480.13-120.bj.1.15 | $120$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 120.480.13-60.bs.1.2 | $120$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 120.480.13-60.bv.1.2 | $120$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 120.480.13-120.fe.1.16 | $120$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 120.480.13-120.fn.1.7 | $120$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 120.480.15-60.v.1.12 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-60.v.1.15 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-60.x.1.10 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-60.x.1.16 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-60.bh.1.11 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-60.bh.1.14 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-60.bj.1.11 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-60.bj.1.14 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-120.cv.1.11 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-120.cv.1.16 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-120.db.1.20 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-120.db.1.23 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-120.ef.1.19 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-120.ef.1.22 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-120.el.1.9 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 120.480.15-120.el.1.14 | $120$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.13-140.bh.1.6 | $280$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 280.480.13-140.bj.1.8 | $280$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 280.480.13-140.bt.1.5 | $280$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 280.480.13-140.bv.1.6 | $280$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 280.480.13-280.dx.1.10 | $280$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 280.480.13-280.ed.1.14 | $280$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 280.480.13-280.fh.1.15 | $280$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 280.480.13-280.fn.1.4 | $280$ | $2$ | $2$ | $13$ | $?$ | not computed |
| 280.480.15-140.ba.1.10 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-140.ba.1.11 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-140.bb.1.10 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-140.bb.1.13 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-140.bi.1.9 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-140.bi.1.14 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-140.bj.1.3 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-140.bj.1.12 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-280.ds.1.14 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-280.ds.1.15 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-280.dv.1.20 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-280.dv.1.23 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-280.eq.1.19 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-280.eq.1.28 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-280.et.1.11 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |
| 280.480.15-280.et.1.16 | $280$ | $2$ | $2$ | $15$ | $?$ | not computed |