## The modular curve $X_{92a}$

Curve name $X_{92a}$
Index $48$
Level $8$
Genus $0$
Does the subgroup contain $-I$? No
Generating matrices $\left[ \begin{matrix} 1 & 2 \\ 0 & 1 \end{matrix}\right], \left[ \begin{matrix} 5 & 0 \\ 0 & 1 \end{matrix}\right], \left[ \begin{matrix} 3 & 0 \\ 0 & 3 \end{matrix}\right], \left[ \begin{matrix} 3 & 3 \\ 0 & 1 \end{matrix}\right]$
Images in lower levels
 Level Index of image Corresponding curve $2$ $3$ $X_{6}$ $4$ $12$ $X_{27}$
Meaning/Special name
Chosen covering $X_{92}$
Curves that $X_{92a}$ minimally covers
Curves that minimally cover $X_{92a}$
Curves that minimally cover $X_{92a}$ and have infinitely many rational points.
Model $\mathbb{P}^{1}$, a universal elliptic curve over an appropriate base is given by $y^2 = x^3 + A(t)x + B(t), \text{ where}$ $A(t) = -108t^{10} + 6480t^{8} - 14472t^{6} + 6480t^{4} - 108t^{2}$ $B(t) = 432t^{15} + 54432t^{13} - 449712t^{11} + 762048t^{9} - 449712t^{7} + 54432t^{5} + 432t^{3}$
Elliptic curve whose $2$-adic image is the subgroup $y^2 + xy = x^3 - x^2 + 5445x + 533250$, with conductor $585$
Generic density of odd order reductions $25/224$