On the nilpotency of subgroups of self-homotopy equivalences.- Linear group homology properties of the inclusion of a ring of integers into a number field.- Unstable localization and periodicity.- On the canonical GL2 ($${Bbb F}$$2)-module structure of K(n)*(B?/2 × B?/2).- Manifolds with highly connected universal covers.- Hochschild and cyclic homology of an almost commutative cochain algebra associated to a nilmanifold.- Closed classes.- On mapping class groups from a homotopy theoretic point of view.- Representations of the homology of BV and the Steenrod algebra II.- Polynomial structures for iterated central extensions of abelian-by-nilpotent groups.- The centralizer decomposition of BG.- The Yagita invariant of general linear groups.- Fibrewise complexes.- A note on the thick subcategory theorem.- The Morava K-theory Hopf ring for BP.- Periodicity of geometric dimension for real projective spaces.- Further structure in K(1)*?kS2n+1.- Tor et Ext-dimensions des H*V-A-modules instables qui sont de type fini comme H*V-modules.- A bound on the exponent of the cohomology of BC-bundles.- A counter-example to a conjecture of Cohen.- The complete Steenrod algebra and the generalized Dickson algebra.- On the localization genus of a space.- Extensions of p-compact groups.- A version of an E2 closed model category structure.- p-adic lattices of pseudo reflection groups.- On the cohomology of configuration spaces.- On isomorphism classes of locally unitary groups.- Localization and genus in group theory and homotopy theory.- On the connectivity of posets in the mapping class group.

Central to this collection of papers are new developments in the general theory of localization of spaces. This field has undergone tremendous change of late and is yielding new insight into the mysteries of classical homotopy theory. The present volume comprises the refereed articles submitted at the Conference on Algebraic Topology held in Sant Feliu de Guíxols, Spain, in June 1994. Several comprehensive articles on general localization clarify the basic tools and give a report on the state of the art in the subject matter. The text is therefore accessible not only to the professional mathematician but also to the advanced student.