The modular curve $X_{225j}$

Curve name $X_{225j}$
Index $96$
Level $16$
Genus $0$
Does the subgroup contain $-I$? No
Generating matrices $ \left[ \begin{matrix} 3 & 3 \\ 0 & 3 \end{matrix}\right], \left[ \begin{matrix} 1 & 0 \\ 0 & 7 \end{matrix}\right], \left[ \begin{matrix} 3 & 3 \\ 0 & 7 \end{matrix}\right]$
Images in lower levels
LevelIndex of imageCorresponding curve
$2$ $3$ $X_{6}$
$4$ $12$ $X_{13f}$
$8$ $48$ $X_{85m}$
Meaning/Special name
Chosen covering $X_{225}$
Curves that $X_{225j}$ minimally covers
Curves that minimally cover $X_{225j}$
Curves that minimally cover $X_{225j}$ and have infinitely many rational points.
Model $\mathbb{P}^{1}$, a universal elliptic curve over an appropriate base is given by \[y^2 = x^3 + A(t)x + B(t), \text{ where}\] \[A(t) = -1855425871872t^{24} - 27831388078080t^{22} - 15713137852416t^{20} - 3913788948480t^{18} - 985242009600t^{16} - 149484994560t^{14} - 23130537984t^{12} - 2335703040t^{10} - 240537600t^{8} - 14929920t^{6} - 936576t^{4} - 25920t^{2} - 27\] \[B(t) = 972777519512027136t^{36} - 30642491864628854784t^{34} - 63154540524569886720t^{32} - 30642491864628854784t^{30} - 10869648806891225088t^{28} - 2842809303847403520t^{26} - 632982247040876544t^{24} - 112216156730818560t^{22} - 18089358573699072t^{20} - 2348795207614464t^{18} - 282646227714048t^{16} - 27396522639360t^{14} - 2414635646976t^{12} - 169444638720t^{10} - 10123149312t^{8} - 445906944t^{6} - 14359680t^{4} - 108864t^{2} + 54\]
Info about rational points
Comments on finding rational points None
Elliptic curve whose $2$-adic image is the subgroup $y^2 + xy + y = x^3 - 54001x - 4834477$, with conductor $75$
Generic density of odd order reductions $11/112$

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