See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/239667801 Classifying Space for Proper Actions and K- Theory of Group C*-algebras Article · January 1994 DOI: 10.1090/conm/167/1292018 CITATIONS 381 READS 60 3 authors, including: Paul Baum Pennsylvania State University 84 PUBLICATIONS 2,168 CITATIONS SEE PROFILE Alain Connes Institut des Hautes Études Scientifiques 237 PUBLICATIONS 23,310 CITATIONS SEE PROFILE All content following this page was uploaded by Alain Connes on 20 March 2015. The user has requested enhancement of the downloaded file. All in-text references underlined in blue are added to the original document and are linked to publications on ResearchGate, letting you access and read them immediately.