- ID: then

## Knowls

Holger Then has contributed to these Knowls:
Fourier expansion of a Maass form on PSL(2,Z[i]),
Laplace-Beltrami operator (hyperbolic),
Laplacian in 3d hyperbolic upper half-space,
Maass forms on PSL(2,Z[i]),
Spectral parameter of Maass forms on PSL(2,Z[i])