Properties

Label 8.24.1.k.1
Level $8$
Index $24$
Genus $1$
Analytic rank $0$
Cusps $4$
$\Q$-cusps $0$

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Invariants

Level: $8$ $\SL_2$-level: $8$ Newform level: $64$
Index: $24$ $\PSL_2$-index:$24$
Genus: $1 = 1 + \frac{ 24 }{12} - \frac{ 0 }{4} - \frac{ 0 }{3} - \frac{ 4 }{2}$
Cusps: $4$ (none of which are rational) Cusp widths $4^{2}\cdot8^{2}$ Cusp orbits $2^{2}$
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: 8B1
Rouse and Zureick-Brown (RZB) label: X126
Rouse, Sutherland, and Zureick-Brown (RSZB) label: 8.24.1.17

Level structure

$\GL_2(\Z/8\Z)$-generators: $\begin{bmatrix}1&4\\0&7\end{bmatrix}$, $\begin{bmatrix}3&4\\0&3\end{bmatrix}$, $\begin{bmatrix}5&3\\2&7\end{bmatrix}$
$\GL_2(\Z/8\Z)$-subgroup: $C_2^2.D_8$
Contains $-I$: yes
Quadratic refinements: 16.48.1-8.k.1.1, 16.48.1-8.k.1.2, 16.48.1-8.k.1.3, 16.48.1-8.k.1.4, 16.48.1-8.k.1.5, 16.48.1-8.k.1.6, 16.48.1-8.k.1.7, 16.48.1-8.k.1.8, 16.48.1-8.k.1.9, 16.48.1-8.k.1.10, 48.48.1-8.k.1.1, 48.48.1-8.k.1.2, 48.48.1-8.k.1.3, 48.48.1-8.k.1.4, 48.48.1-8.k.1.5, 48.48.1-8.k.1.6, 48.48.1-8.k.1.7, 48.48.1-8.k.1.8, 48.48.1-8.k.1.9, 48.48.1-8.k.1.10, 80.48.1-8.k.1.1, 80.48.1-8.k.1.2, 80.48.1-8.k.1.3, 80.48.1-8.k.1.4, 80.48.1-8.k.1.5, 80.48.1-8.k.1.6, 80.48.1-8.k.1.7, 80.48.1-8.k.1.8, 80.48.1-8.k.1.9, 80.48.1-8.k.1.10, 112.48.1-8.k.1.1, 112.48.1-8.k.1.2, 112.48.1-8.k.1.3, 112.48.1-8.k.1.4, 112.48.1-8.k.1.5, 112.48.1-8.k.1.6, 112.48.1-8.k.1.7, 112.48.1-8.k.1.8, 112.48.1-8.k.1.9, 112.48.1-8.k.1.10, 176.48.1-8.k.1.1, 176.48.1-8.k.1.2, 176.48.1-8.k.1.3, 176.48.1-8.k.1.4, 176.48.1-8.k.1.5, 176.48.1-8.k.1.6, 176.48.1-8.k.1.7, 176.48.1-8.k.1.8, 176.48.1-8.k.1.9, 176.48.1-8.k.1.10, 208.48.1-8.k.1.1, 208.48.1-8.k.1.2, 208.48.1-8.k.1.3, 208.48.1-8.k.1.4, 208.48.1-8.k.1.5, 208.48.1-8.k.1.6, 208.48.1-8.k.1.7, 208.48.1-8.k.1.8, 208.48.1-8.k.1.9, 208.48.1-8.k.1.10, 240.48.1-8.k.1.1, 240.48.1-8.k.1.2, 240.48.1-8.k.1.3, 240.48.1-8.k.1.4, 240.48.1-8.k.1.5, 240.48.1-8.k.1.6, 240.48.1-8.k.1.7, 240.48.1-8.k.1.8, 240.48.1-8.k.1.9, 240.48.1-8.k.1.10, 272.48.1-8.k.1.1, 272.48.1-8.k.1.2, 272.48.1-8.k.1.3, 272.48.1-8.k.1.4, 272.48.1-8.k.1.5, 272.48.1-8.k.1.6, 272.48.1-8.k.1.7, 272.48.1-8.k.1.8, 272.48.1-8.k.1.9, 272.48.1-8.k.1.10, 304.48.1-8.k.1.1, 304.48.1-8.k.1.2, 304.48.1-8.k.1.3, 304.48.1-8.k.1.4, 304.48.1-8.k.1.5, 304.48.1-8.k.1.6, 304.48.1-8.k.1.7, 304.48.1-8.k.1.8, 304.48.1-8.k.1.9, 304.48.1-8.k.1.10
Cyclic 8-isogeny field degree: $4$
Cyclic 8-torsion field degree: $16$
Full 8-torsion field degree: $64$

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 $ $=$ $ 4 y^{2} - 2 z^{2} + w^{2} $
$=$ $4 x^{2} + y w$
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Singular plane model Singular plane model

$ 0 $ $=$ $ x^{4} - 2 y^{2} z^{2} + 4 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:

$\displaystyle X$ $=$ $\displaystyle x$
$\displaystyle Y$ $=$ $\displaystyle \frac{1}{2}z$
$\displaystyle Z$ $=$ $\displaystyle \frac{1}{4}w$

Maps to other modular curves

$j$-invariant map of degree 24 from the embedded model of this modular curve to the modular curve $X(1)$ :

$\displaystyle j$ $=$ $\displaystyle 2^6\,\frac{(2z^{2}+3w^{2})^{3}}{w^{2}(2z^{2}-w^{2})^{2}}$

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
8.12.0.i.1 $8$ $2$ $2$ $0$ $0$ full Jacobian
8.12.0.w.1 $8$ $2$ $2$ $0$ $0$ full Jacobian
8.12.1.a.1 $8$ $2$ $2$ $1$ $0$ 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
8.48.1.bi.1 $8$ $2$ $2$ $1$ $0$ dimension zero
8.48.1.bj.1 $8$ $2$ $2$ $1$ $0$ dimension zero
16.48.3.q.1 $16$ $2$ $2$ $3$ $0$ $1^{2}$
16.48.3.w.1 $16$ $2$ $2$ $3$ $0$ $2$
16.48.3.w.2 $16$ $2$ $2$ $3$ $0$ $2$
16.48.3.ba.1 $16$ $2$ $2$ $3$ $1$ $1^{2}$
24.48.1.dt.1 $24$ $2$ $2$ $1$ $0$ dimension zero
24.48.1.du.1 $24$ $2$ $2$ $1$ $0$ dimension zero
24.72.5.bo.1 $24$ $3$ $3$ $5$ $2$ $1^{4}$
24.96.5.y.1 $24$ $4$ $4$ $5$ $0$ $1^{4}$
40.48.1.de.1 $40$ $2$ $2$ $1$ $0$ dimension zero
40.48.1.df.1 $40$ $2$ $2$ $1$ $0$ dimension zero
40.120.9.u.1 $40$ $5$ $5$ $9$ $3$ $1^{6}\cdot2$
40.144.9.be.1 $40$ $6$ $6$ $9$ $1$ $1^{6}\cdot2$
40.240.17.ge.1 $40$ $10$ $10$ $17$ $6$ $1^{12}\cdot2^{2}$
48.48.3.q.1 $48$ $2$ $2$ $3$ $0$ $1^{2}$
48.48.3.v.1 $48$ $2$ $2$ $3$ $0$ $2$
48.48.3.v.2 $48$ $2$ $2$ $3$ $0$ $2$
48.48.3.ba.1 $48$ $2$ $2$ $3$ $1$ $1^{2}$
56.48.1.de.1 $56$ $2$ $2$ $1$ $0$ dimension zero
56.48.1.df.1 $56$ $2$ $2$ $1$ $0$ dimension zero
56.192.13.y.1 $56$ $8$ $8$ $13$ $1$ $1^{8}\cdot2^{2}$
56.504.37.bo.1 $56$ $21$ $21$ $37$ $15$ $1^{4}\cdot2^{14}\cdot4$
56.672.49.bo.1 $56$ $28$ $28$ $49$ $16$ $1^{12}\cdot2^{16}\cdot4$
80.48.3.s.1 $80$ $2$ $2$ $3$ $?$ not computed
80.48.3.z.1 $80$ $2$ $2$ $3$ $?$ not computed
80.48.3.z.2 $80$ $2$ $2$ $3$ $?$ not computed
80.48.3.bg.1 $80$ $2$ $2$ $3$ $?$ not computed
88.48.1.de.1 $88$ $2$ $2$ $1$ $?$ dimension zero
88.48.1.df.1 $88$ $2$ $2$ $1$ $?$ dimension zero
88.288.21.y.1 $88$ $12$ $12$ $21$ $?$ not computed
104.48.1.de.1 $104$ $2$ $2$ $1$ $?$ dimension zero
104.48.1.df.1 $104$ $2$ $2$ $1$ $?$ dimension zero
112.48.3.q.1 $112$ $2$ $2$ $3$ $?$ not computed
112.48.3.v.1 $112$ $2$ $2$ $3$ $?$ not computed
112.48.3.v.2 $112$ $2$ $2$ $3$ $?$ not computed
112.48.3.ba.1 $112$ $2$ $2$ $3$ $?$ not computed
120.48.1.je.1 $120$ $2$ $2$ $1$ $?$ dimension zero
120.48.1.jf.1 $120$ $2$ $2$ $1$ $?$ dimension zero
136.48.1.de.1 $136$ $2$ $2$ $1$ $?$ dimension zero
136.48.1.df.1 $136$ $2$ $2$ $1$ $?$ dimension zero
152.48.1.de.1 $152$ $2$ $2$ $1$ $?$ dimension zero
152.48.1.df.1 $152$ $2$ $2$ $1$ $?$ dimension zero
168.48.1.je.1 $168$ $2$ $2$ $1$ $?$ dimension zero
168.48.1.jf.1 $168$ $2$ $2$ $1$ $?$ dimension zero
176.48.3.q.1 $176$ $2$ $2$ $3$ $?$ not computed
176.48.3.v.1 $176$ $2$ $2$ $3$ $?$ not computed
176.48.3.v.2 $176$ $2$ $2$ $3$ $?$ not computed
176.48.3.ba.1 $176$ $2$ $2$ $3$ $?$ not computed
184.48.1.de.1 $184$ $2$ $2$ $1$ $?$ dimension zero
184.48.1.df.1 $184$ $2$ $2$ $1$ $?$ dimension zero
208.48.3.s.1 $208$ $2$ $2$ $3$ $?$ not computed
208.48.3.z.1 $208$ $2$ $2$ $3$ $?$ not computed
208.48.3.z.2 $208$ $2$ $2$ $3$ $?$ not computed
208.48.3.bg.1 $208$ $2$ $2$ $3$ $?$ not computed
232.48.1.de.1 $232$ $2$ $2$ $1$ $?$ dimension zero
232.48.1.df.1 $232$ $2$ $2$ $1$ $?$ dimension zero
240.48.3.s.1 $240$ $2$ $2$ $3$ $?$ not computed
240.48.3.z.1 $240$ $2$ $2$ $3$ $?$ not computed
240.48.3.z.2 $240$ $2$ $2$ $3$ $?$ not computed
240.48.3.bg.1 $240$ $2$ $2$ $3$ $?$ not computed
248.48.1.de.1 $248$ $2$ $2$ $1$ $?$ dimension zero
248.48.1.df.1 $248$ $2$ $2$ $1$ $?$ dimension zero
264.48.1.je.1 $264$ $2$ $2$ $1$ $?$ dimension zero
264.48.1.jf.1 $264$ $2$ $2$ $1$ $?$ dimension zero
272.48.3.q.1 $272$ $2$ $2$ $3$ $?$ not computed
272.48.3.z.1 $272$ $2$ $2$ $3$ $?$ not computed
272.48.3.z.2 $272$ $2$ $2$ $3$ $?$ not computed
272.48.3.bi.1 $272$ $2$ $2$ $3$ $?$ not computed
280.48.1.is.1 $280$ $2$ $2$ $1$ $?$ dimension zero
280.48.1.it.1 $280$ $2$ $2$ $1$ $?$ dimension zero
296.48.1.de.1 $296$ $2$ $2$ $1$ $?$ dimension zero
296.48.1.df.1 $296$ $2$ $2$ $1$ $?$ dimension zero
304.48.3.q.1 $304$ $2$ $2$ $3$ $?$ not computed
304.48.3.v.1 $304$ $2$ $2$ $3$ $?$ not computed
304.48.3.v.2 $304$ $2$ $2$ $3$ $?$ not computed
304.48.3.ba.1 $304$ $2$ $2$ $3$ $?$ not computed
312.48.1.je.1 $312$ $2$ $2$ $1$ $?$ dimension zero
312.48.1.jf.1 $312$ $2$ $2$ $1$ $?$ dimension zero
328.48.1.de.1 $328$ $2$ $2$ $1$ $?$ dimension zero
328.48.1.df.1 $328$ $2$ $2$ $1$ $?$ dimension zero