Selberg 1956: identity between geometric (closed-geodesics) + spectral (eigenvalues of Laplace) data on hyperbolic-surface. Generalises Poisson-summation. Underlies Langlands + automorphic-forms.
Selberg 1956: identity between geometric (closed-geodesics) + spectral (eigenvalues of Laplace) data on hyperbolic-surface. Generalises Poisson-summation. Underlies Langlands + automorphic-forms.