Properties

Label 40.144.3-20.b.1.32
Level $40$
Index $144$
Genus $3$
Analytic rank $0$
Cusps $8$
$\Q$-cusps $8$

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Invariants

Level: $40$ $\SL_2$-level: $20$ Newform level: $40$
Index: $144$ $\PSL_2$-index:$72$
Genus: $3 = 1 + \frac{ 72 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 8 }{2}$
Cusps: $8$ (all of which are rational) Cusp widths $2^{2}\cdot4^{2}\cdot10^{2}\cdot20^{2}$ Cusp orbits $1^{8}$
Elliptic points: $0$ of order $2$ and $0$ of order $3$
Analytic rank: $0$
$\Q$-gonality: $2$
$\overline{\Q}$-gonality: $2$
Rational cusps: $8$
Rational CM points: none

Other labels

Cummins and Pauli (CP) label: 20J3
Rouse, Sutherland, and Zureick-Brown (RSZB) label: 40.144.3.755

Level structure

$\GL_2(\Z/40\Z)$-generators: $\begin{bmatrix}11&20\\28&33\end{bmatrix}$, $\begin{bmatrix}17&34\\0&21\end{bmatrix}$, $\begin{bmatrix}25&34\\8&31\end{bmatrix}$, $\begin{bmatrix}27&16\\4&39\end{bmatrix}$, $\begin{bmatrix}29&14\\0&3\end{bmatrix}$, $\begin{bmatrix}35&2\\12&5\end{bmatrix}$, $\begin{bmatrix}35&16\\24&7\end{bmatrix}$
Contains $-I$: no $\quad$ (see 20.72.3.b.1 for the level structure with $-I$)
Cyclic 40-isogeny field degree: $2$
Cyclic 40-torsion field degree: $32$
Full 40-torsion field degree: $5120$

Jacobian

Conductor: $2^{7}\cdot5^{3}$
Simple: no
Squarefree: no
Decomposition: $1^{3}$
Newforms: 20.2.a.a$^{2}$, 40.2.a.a

Models

Embedded model Embedded model in $\mathbb{P}^{4}$

$ 0 $ $=$ $ x z w + y z^{2} - z^{3} - z w^{2} $
$=$ $x y w + y^{2} z - y z^{2} - y w^{2}$
$=$ $x w t + y z t - z^{2} t - w^{2} t$
$=$ $x^{2} w + x y z - x z^{2} - x w^{2}$
$=$$\cdots$
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Singular plane model Singular plane model

$ 0 $ $=$ $ x^{4} y - x^{4} z - 5 x^{3} y^{2} + 6 x^{3} y z + x^{3} z^{2} - 10 x^{2} y z^{2} + 8 x y z^{3} - 4 y z^{4} $
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Weierstrass model Weierstrass model

$ y^{2} + \left(x^{4} + 1\right) y $ $=$ $ 2x^{6} - x^{4} + 2x^{2} $
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Rational points

This modular curve has 8 rational cusps but no known non-cuspidal rational points. The following are the coordinates of the rational cusps on this modular curve.

Embedded model
$(2:0:0:2:1)$, $(1:1:1:0:0)$, $(0:1:0:0:0)$, $(1:-1:0:1:0)$, $(1:-1:-1:0:1)$, $(1:1:0:1:1)$, $(0:1:1:0:0)$, $(0:0:0:0:1)$

Maps to other modular curves

$j$-invariant map of degree 72 from the embedded model of this modular curve to the modular curve $X(1)$ :

$\displaystyle j$ $=$ $\displaystyle -\frac{12800xz^{10}-4034560xz^{9}t+21305600xz^{8}t^{2}-34198080xz^{7}t^{3}-2117570560xz^{6}t^{4}+6128313952xz^{5}t^{5}-19451758056xz^{4}t^{6}+14932369752xz^{3}t^{7}+14981221944xz^{2}t^{8}-175743804755xzt^{9}+52220107670xw^{2}t^{8}-27694854835xwt^{9}+33914880xt^{10}-38400y^{11}+972800y^{10}w-6342400y^{10}t-985600y^{9}w^{2}-15059200y^{9}wt+89740800y^{9}t^{2}-7782400y^{8}w^{3}+52556800y^{8}w^{2}t-52537600y^{8}wt^{2}-286536000y^{8}t^{3}+49120000y^{7}w^{3}t-266220800y^{7}w^{2}t^{2}+517137600y^{7}wt^{3}+351201600y^{7}t^{4}-80560000y^{6}w^{3}t^{2}+511148800y^{6}w^{2}t^{3}-1299209600y^{6}wt^{4}-473226000y^{6}t^{5}-117009600y^{5}w^{3}t^{3}-488671200y^{5}w^{2}t^{4}+2248835600y^{5}wt^{5}-99823800y^{5}t^{6}+603278400y^{4}w^{3}t^{4}+188439136y^{4}w^{2}t^{5}-2196583072y^{4}wt^{6}+174951996y^{4}t^{7}-1638575680y^{3}w^{3}t^{5}+224499368y^{3}w^{2}t^{6}+1874680488y^{3}wt^{7}+9132551194y^{3}t^{8}+2531392208y^{2}w^{3}t^{6}-3016506516y^{2}w^{2}t^{7}-9834136706y^{2}wt^{8}+11889126709y^{2}t^{9}+2352218848yw^{3}t^{7}+21829028880yw^{2}t^{8}-45849335452ywt^{9}+101065897242yt^{10}-14848z^{11}+3904256z^{10}t-36303360z^{9}t^{2}+186738560z^{8}t^{3}-1094923840z^{7}t^{4}+8636607280z^{6}t^{5}-26429777424z^{5}t^{6}+76428306028z^{4}t^{7}-119369075946z^{3}t^{8}+123192512386z^{2}t^{9}-179687969984zwt^{9}+404318508136zt^{10}+7116800w^{11}-81004800w^{10}t+472534400w^{9}t^{2}-1763006400w^{8}t^{3}+4494724000w^{7}t^{4}-8796563616w^{6}t^{5}+12305142416w^{5}t^{6}-2773634576w^{4}t^{7}-14589418466w^{3}t^{8}-33421138814w^{2}t^{9}-70366269166wt^{10}-6619136t^{11}}{t^{2}(40448xz^{8}-743936xz^{7}t+8067328xz^{6}t^{2}-69590592xz^{5}t^{3}+536553904xz^{4}t^{4}-3882072996xz^{3}t^{5}+26391596614xz^{2}t^{6}-154938202385xzt^{7}+10970297282xw^{2}t^{6}+52308631920xwt^{7}-1200y^{6}t^{3}+36400y^{5}wt^{3}+597800y^{5}t^{4}-206800y^{4}w^{2}t^{3}-1860200y^{4}wt^{4}-15495144y^{4}t^{5}+596800y^{3}w^{3}t^{3}+6275800y^{3}w^{2}t^{4}+59424720y^{3}wt^{5}+579783766y^{3}t^{6}-16446400y^{2}w^{3}t^{4}-144555132y^{2}w^{2}t^{5}-1153618252y^{2}wt^{6}-3572408392y^{2}t^{7}+366886148yw^{3}t^{5}+3012245694yw^{2}t^{6}+12859988239ywt^{7}+24664112626yt^{8}-80896z^{8}t+1531648z^{7}t^{2}-16925712z^{6}t^{3}+147377240z^{5}t^{4}-1130326692z^{4}t^{5}+7597008424z^{3}t^{6}-49444768159z^{2}t^{7}+61999321176zwt^{7}+98656450504zt^{8}+841200w^{6}t^{3}+22373400w^{5}t^{4}+527624344w^{4}t^{5}-7064686118w^{3}t^{6}-31435157547w^{2}t^{7}-61975280954wt^{8})}$

Map of degree 1 from the embedded model of this modular curve to the plane model of the modular curve 20.72.3.b.1 :

$\displaystyle X$ $=$ $\displaystyle x$
$\displaystyle Y$ $=$ $\displaystyle \frac{1}{5}w$
$\displaystyle Z$ $=$ $\displaystyle t$

Equation of the image curve:

$0$ $=$ $ X^{4}Y-5X^{3}Y^{2}-X^{4}Z+6X^{3}YZ+X^{3}Z^{2}-10X^{2}YZ^{2}+8XYZ^{3}-4YZ^{4} $

Map of degree 1 from the embedded model of this modular curve to the Weierstrass model of the modular curve 20.72.3.b.1 :

$\displaystyle X$ $=$ $\displaystyle -x+t$
$\displaystyle Y$ $=$ $\displaystyle -x^{3}w+5x^{3}t-8x^{2}t^{2}+6xt^{3}-3t^{4}$
$\displaystyle Z$ $=$ $\displaystyle t$

Modular covers

This modular curve minimally covers the modular curves listed below.

Covered curve Level Index Degree Genus Rank Kernel decomposition
40.24.0-4.b.1.11 $40$ $6$ $6$ $0$ $0$ full Jacobian
40.72.1-10.a.1.1 $40$ $2$ $2$ $1$ $0$ $1^{2}$
40.72.1-20.c.1.3 $40$ $2$ $2$ $1$ $0$ $1^{2}$

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

Covering curve Level Index Degree Genus Rank Kernel decomposition
40.288.5-20.b.1.29 $40$ $2$ $2$ $5$ $0$ $2$
40.288.5-20.b.2.23 $40$ $2$ $2$ $5$ $0$ $2$
40.288.5-20.d.1.9 $40$ $2$ $2$ $5$ $0$ $2$
40.288.5-20.d.2.4 $40$ $2$ $2$ $5$ $0$ $2$
40.288.5-40.e.1.16 $40$ $2$ $2$ $5$ $0$ $2$
40.288.5-40.e.2.12 $40$ $2$ $2$ $5$ $0$ $2$
40.288.5-40.k.1.12 $40$ $2$ $2$ $5$ $0$ $2$
40.288.5-40.k.2.4 $40$ $2$ $2$ $5$ $0$ $2$
40.288.7-20.b.1.3 $40$ $2$ $2$ $7$ $0$ $1^{4}$
40.288.7-40.c.1.10 $40$ $2$ $2$ $7$ $2$ $1^{4}$
40.288.7-20.e.1.5 $40$ $2$ $2$ $7$ $1$ $1^{4}$
40.288.7-40.h.1.12 $40$ $2$ $2$ $7$ $2$ $1^{4}$
40.288.7-20.j.1.14 $40$ $2$ $2$ $7$ $0$ $2^{2}$
40.288.7-20.j.2.12 $40$ $2$ $2$ $7$ $0$ $2^{2}$
40.288.7-40.o.1.15 $40$ $2$ $2$ $7$ $0$ $2^{2}$
40.288.7-40.o.2.9 $40$ $2$ $2$ $7$ $0$ $2^{2}$
40.288.7-40.p.1.18 $40$ $2$ $2$ $7$ $0$ $2^{2}$
40.288.7-40.p.2.12 $40$ $2$ $2$ $7$ $0$ $2^{2}$
40.288.7-40.q.1.12 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.q.2.14 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.r.1.16 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.r.2.7 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.s.1.11 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.s.2.14 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.s.3.6 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.s.4.12 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.t.1.9 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.t.2.10 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.t.3.2 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.t.4.4 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.u.1.14 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.u.2.5 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.v.1.11 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.v.2.10 $40$ $2$ $2$ $7$ $0$ $4$
40.288.7-40.ba.1.16 $40$ $2$ $2$ $7$ $0$ $2^{2}$
40.288.7-40.ba.2.8 $40$ $2$ $2$ $7$ $0$ $2^{2}$
40.288.7-40.bm.1.11 $40$ $2$ $2$ $7$ $2$ $1^{4}$
40.288.7-40.bn.1.9 $40$ $2$ $2$ $7$ $1$ $1^{4}$
40.288.7-40.bq.1.17 $40$ $2$ $2$ $7$ $2$ $1^{4}$
40.288.7-40.br.1.21 $40$ $2$ $2$ $7$ $0$ $1^{4}$
40.288.9-40.c.1.11 $40$ $2$ $2$ $9$ $1$ $1^{4}\cdot2$
40.288.9-40.d.1.10 $40$ $2$ $2$ $9$ $0$ $1^{4}\cdot2$
40.288.9-40.g.1.11 $40$ $2$ $2$ $9$ $3$ $1^{4}\cdot2$
40.288.9-40.h.1.12 $40$ $2$ $2$ $9$ $2$ $1^{4}\cdot2$
40.288.9-40.k.1.11 $40$ $2$ $2$ $9$ $0$ $2\cdot4$
40.288.9-40.k.2.9 $40$ $2$ $2$ $9$ $0$ $2\cdot4$
40.288.9-40.l.1.14 $40$ $2$ $2$ $9$ $0$ $2\cdot4$
40.288.9-40.l.2.10 $40$ $2$ $2$ $9$ $0$ $2\cdot4$
40.720.19-20.b.1.5 $40$ $5$ $5$ $19$ $1$ $1^{16}$
120.288.5-60.bd.1.24 $120$ $2$ $2$ $5$ $?$ not computed
120.288.5-60.bd.2.21 $120$ $2$ $2$ $5$ $?$ not computed
120.288.5-60.bf.1.24 $120$ $2$ $2$ $5$ $?$ not computed
120.288.5-60.bf.2.21 $120$ $2$ $2$ $5$ $?$ not computed
120.288.5-120.dk.1.23 $120$ $2$ $2$ $5$ $?$ not computed
120.288.5-120.dk.2.11 $120$ $2$ $2$ $5$ $?$ not computed
120.288.5-120.dq.1.27 $120$ $2$ $2$ $5$ $?$ not computed
120.288.5-120.dq.2.19 $120$ $2$ $2$ $5$ $?$ not computed
120.288.7-60.r.1.16 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-60.ba.1.18 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.ct.1.65 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.ei.1.45 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-60.el.1.28 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-60.el.2.24 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yl.1.43 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yl.2.38 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.ym.1.43 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.ym.2.39 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yn.1.44 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yn.2.19 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yo.1.38 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yo.2.27 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yp.1.45 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yp.2.43 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yp.3.21 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yp.4.10 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yq.1.43 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yq.2.39 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yq.3.18 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yq.4.4 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yr.1.36 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.yr.2.23 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.ys.1.44 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.ys.2.7 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.bcr.1.31 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.bcr.2.23 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.beb.1.35 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.bec.1.37 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.bef.1.42 $120$ $2$ $2$ $7$ $?$ not computed
120.288.7-120.beg.1.43 $120$ $2$ $2$ $7$ $?$ not computed
120.288.9-120.is.1.9 $120$ $2$ $2$ $9$ $?$ not computed
120.288.9-120.it.1.11 $120$ $2$ $2$ $9$ $?$ not computed
120.288.9-120.li.1.17 $120$ $2$ $2$ $9$ $?$ not computed
120.288.9-120.lj.1.19 $120$ $2$ $2$ $9$ $?$ not computed
120.288.9-120.bcc.1.7 $120$ $2$ $2$ $9$ $?$ not computed
120.288.9-120.bcc.2.13 $120$ $2$ $2$ $9$ $?$ not computed
120.288.9-120.bcd.1.7 $120$ $2$ $2$ $9$ $?$ not computed
120.288.9-120.bcd.2.13 $120$ $2$ $2$ $9$ $?$ not computed
120.432.15-60.b.1.89 $120$ $3$ $3$ $15$ $?$ not computed
280.288.5-140.j.1.17 $280$ $2$ $2$ $5$ $?$ not computed
280.288.5-140.j.2.14 $280$ $2$ $2$ $5$ $?$ not computed
280.288.5-140.l.1.18 $280$ $2$ $2$ $5$ $?$ not computed
280.288.5-140.l.2.16 $280$ $2$ $2$ $5$ $?$ not computed
280.288.5-280.bc.1.27 $280$ $2$ $2$ $5$ $?$ not computed
280.288.5-280.bc.2.19 $280$ $2$ $2$ $5$ $?$ not computed
280.288.5-280.bi.1.23 $280$ $2$ $2$ $5$ $?$ not computed
280.288.5-280.bi.2.19 $280$ $2$ $2$ $5$ $?$ not computed
280.288.7-140.e.1.18 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.g.1.38 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-140.h.1.22 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.n.1.46 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-140.o.1.22 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-140.o.2.12 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.be.1.38 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.be.2.36 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bf.1.40 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bf.2.40 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bg.1.39 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bg.2.17 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bh.1.37 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bh.2.25 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bi.1.45 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bi.2.43 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bi.3.13 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bi.4.10 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bj.1.43 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bj.2.39 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bj.3.10 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bj.4.4 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bk.1.35 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bk.2.21 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bl.1.39 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bl.2.5 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bq.1.31 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.bq.2.15 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.cc.1.35 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.cd.1.37 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.cg.1.35 $280$ $2$ $2$ $7$ $?$ not computed
280.288.7-280.ch.1.37 $280$ $2$ $2$ $7$ $?$ not computed
280.288.9-280.c.1.18 $280$ $2$ $2$ $9$ $?$ not computed
280.288.9-280.d.1.19 $280$ $2$ $2$ $9$ $?$ not computed
280.288.9-280.g.1.18 $280$ $2$ $2$ $9$ $?$ not computed
280.288.9-280.h.1.19 $280$ $2$ $2$ $9$ $?$ not computed
280.288.9-280.k.1.13 $280$ $2$ $2$ $9$ $?$ not computed
280.288.9-280.k.2.13 $280$ $2$ $2$ $9$ $?$ not computed
280.288.9-280.l.1.13 $280$ $2$ $2$ $9$ $?$ not computed
280.288.9-280.l.2.13 $280$ $2$ $2$ $9$ $?$ not computed