A note on the WAP-compactification of groups.
A partial classification result for noncommutative tori.
A Perron FrobeniusTheory for Representations of Locally Compact Abelian Groups.
A proof of the Mackey-Blattner-Nielsen theorem.
A property for locally convex *-algebras related to property (T) and character amenability
For a locally convex *-algebra A equipped with a fixed continuous *-character ε (which is roughly speaking a generalized F*-algebra), we define a cohomological property, called property (FH), which is similar to character amenability. Let be the space of continuous functions with compact support on a second countable locally compact group G equipped with the convolution *-algebra structure and a certain inductive topology. We show that has property (FH) if and only if G has property (T). On...
A Qualitative Uncertainty Principle for Certain Locally Compact Groups.
A ratio ergodic theorem for multiparameter non-singular actions
We prove a ratio ergodic theorem for non-singular free and actions, along balls in an arbitrary norm. Using a Chacon–Ornstein type lemma the proof is reduced to a statement about the amount of mass of a probability measure that can concentrate on (thickened) boundaries of balls in . The proof relies on geometric properties of norms, including the Besicovitch covering lemma and the fact that boundaries of balls have lower dimension than the ambient space. We also show that for general group...
A Short Proof of a Classical Covering Lemma.
A Simple Proof of Borel's Density Theorem.
A Stone-Weierstrass theorem for group representations.
A survey on representations of the unitary group U(∞)
A uniformly bounded representation associated to a free set in a discrete group
Abschätzung von Normen gewisser Matrizen und eine Anwendung.
Action moyennable d'un groupe localement compact sur une algèbre de von Neumann II.
Action moyennable d'un groupe localement compact sur une algebre de von Neumann.
Action of algebraic groups of automorphisms on the dual of a class of type groups
Algebra Involutions on the Bidual of a Banach Algebra.
Algebraic Hulls and the Folner Property.
Algèbre de Jordan et ensemble de Wallach.
Algèbres et convoluteurs de