Nicolas Bergeron is a Professor at Université Pierre et Marie Curie in Paris. His research interests are in geometry and automorphic forms, in particular the topology and spectral geometry of locally symmetric spaces.
The French book under review gives an introduction to hyperbolic surfaces with an emphasis on the Selberg conjecture. ... it is intended for advanced graduate students but is also well suited for all those who want to acquaint themselves with harmonic analysis on hyperbolic surfaces and automorphic forms. (Frank Monheim, zbMATH, August, 2017) This book gives a very nice introduction to the spectral theory of the Laplace-Beltrami operator on hyperbolic surfaces of constant negative curvature. ... mainly intended for students with a knowledge of basic differential geometry and functional analysis but also for people doing research in other domains of mathematics or mathematical physics and interested in the present day problems in this very active field of research. ... book gives one of the best introductions to this fascinating field of interdisciplinary research. (Dieter H. Mayer, Mathematical Reviews, August, 2017)