%0 Journal Article %A Heins, Michael %A Moucha, Annika %A Roth, Oliver %T Spectral theory of the invariant Laplacian on the disk and the sphere – a complex analysis approach %J Canadian journal of mathematics %D 2025 %P 940-974 %V 77 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/S0008414X2400021X/ %R 10.4153/S0008414X2400021X %F 10_4153_S0008414X2400021X