Isn't there something like Fouriernets and spdnets already, and stuff on Riemannian manifolds and my head is spinning? Followed Daniel Brook's work for some tim

Isn't there something like Fouriernets and spdnets already, and stuff on Riemannian manifolds and my head is spinning? Followed Daniel Brook's work for some time, e.g. https://hal.archives-ouvertes.fr/hal-02290838 https://hal.archives-ouvertes.fr/hal-02290838