Download or read book The Spectral Theory of Geometrically Periodic Hyperbolic 3-Manifolds written by Charles L. Epstein and published by American Mathematical Soc.. This book was released on 1985 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper we develop the spectral theory of the Laplace-Beltrami operator for geometrically periodic hyperbolic 3-manifolds, [double-struck capital]H3/G. Using the theory of holomorphic families of operators, we obtain a quantitative description of the absolutely continuous spectrum.