the high concept for something like this https://www.sciencedirect.com/science/article/pii/S1018364715000439 … is /how do Maass forms change under such transforms?/
(I am spread a little thin presently and am getting /hey, you have artistic merit/, so such speculations are more along the lines of /how can I appeal to standard mathematician types/ by mechanically speculating about things which might be of interest)