Let $q=e^{2\pi i\tau}$. If $u(\tau)$ is Ramanujan's octic continued fraction,


is it true that the generator of the octahedral group is the continued fraction,


for $|q|\lt 1$?

  • $\begingroup$ I improved your post. Beautiful cfrac for $(u(2\tau))^2$! Where did you find this? $\endgroup$ Jul 23, 2015 at 14:02


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