This collection of papers is based on lectures delivered at the Tata Institute of Fundamental Research (TIFR) as part of a special year on arithmetic groups, $L

Cohomology of arithmetic groups serves as a tool in studying possible relations between the theory of automorphic forms and the arithmetic of algebraic varietie

This volume contains original research articles, survey articles and lecture notes related to the Computations with Modular Forms 2011 Summer School and Confere