( This is my first MO question . I'm totally inexperienced on MO so, forgive me for my mistakes .)
Paul Garrett and Enrico Bombieri were (are?) Secretly Working on Pseudo-Laplacians and Pseudo-cuspforms ( inspired after Y. Colin de Verdi`ere 1983 paper),in spirit of Riemann hypothesis ,for several years.
In 2018 "Perspectives on Riemann hypothesis" conference they both reported ( in forms of lectures) the progress they made .(here and here)
Recently (Feb 2020) they uploaded the official preprint on arxiv (here)
There are three questions I like to ask :
(1) Even though the official preprint is very recent but the announcement of this argument is in the mentioned conference (2 years earlier ) . So, is there anyone (other than them) working on the subject (seriously) ?. Also with eyes of other experts how promising is this approach?
(2) Is this a suitable topic for Polymath project ?
(3)(Main question) There is an open problem in end of Bombieri's lecture
i.e. find an asymptotic formula for
$$\frac{1}{4πi}\int_{(1/2)}|E_s(D)|^2\frac{ds}{λ_s^2}$$
What's the status of this problem ?