Let G be a connected semi-simple group defined over the field Q of rational numbers and H an arithmetic subgroup of G. By definition, then, H is a subgroup of GQ and if £ :G->GL W is an injective… Expand

Here H(L) is viewed s a topological group, for the topology associated to that of L, and Γ cocompact in H(L) means that the quotient space H(L)/F is compact. If L = R, C, the result was known [1] (In… Expand

In previous papers [13], [2], [16], [3], [ l l ] , the theory of automorphic functions for some classical discontinuous groups F, such as the Siegel or Hilbert-Siegel modular groups, acting on… Expand

Introduction. In [1], [2] we gave a range of dimensions in which the real cohomology of an arithmetic or S-arithmetic subgroup T of a connected semisimple group G over Q is naturally isomorphic to… Expand

"Daniel et Lisbeth, enfants Liengme" ("Daniel and Lisbeth, Liengme children") Photograph of a group of African and European children. They stand in front of a building at Elim Hospital.; Photographie… Expand