2 papers
math.KT2004
Unbounded symmetric operators in -homology and the Baum-Connes Conjecture
Hela Bettaieb, Michel Matthey, Alain Valette
Using the unbounded picture of analytical K-homology, we associate a well-defined K-homology class to an unbounded symmetric operator satisfying certain mild technical conditions.…
math.AT2004
Homotopy invariance of higher signatures and 3-manifold groups
Michel Matthey, Hervé Oyono-Oyono, Wolfgang Pitsch
For closed oriented manifolds, we establish oriented homotopy invariance of higher signatures that come from the fundamental group of a large class of orientable 3-manifolds, inclu…