A locally compact group has the Haagerup property, or is a-T-menable in the sense of Gromov, if it admits a proper isometric action on some affine Hilbert space. As Gromov's pun is trying to indicate, this definition is designed as a strong negation to Kazhdan's property (T), characterized by the fact that every isometric action on some affine Hilbert space has a fixed point. This book is to covers various aspects of the Haagerup property. It gives several new examples.
- ISBN13 9783034894869
- Publish Date 1 November 2012 (first published 1 August 2001)
- Publish Status Active
- Publish Country CH
- Imprint Birkhauser Verlag AG
- Edition Softcover reprint of the original 1st ed. 2001
- Format Paperback
- Pages 126
- Language English