71 citations · 286 across the 17 of their papers we have counts for
17 papers
Dynamical propagation and Roe algebras of warped spaces
Tim de Laat, Federico Vigolo, Jeroen Winkel
Given a non-singular action , we define the -algebra of operators of finite dynamical propagation associated w…
Actions of higher rank groups on uniformly convex Banach spaces
Tim de Laat, Mikael de la Salle
We prove that all isometric actions of higher rank simple Lie groups and their lattices on arbitrary uniformly convex Banach spaces have a fixed point. This vastly generalises a re…
Weak*-continuity of invariant means on spaces of matrix coefficients
Tim de Laat, Safoura Zadeh
With every locally compact group , one can associate several interesting bi-invariant subspaces of the weakly almost periodic functions on , each of…
Exotic group -algebras of simple Lie groups with real rank one
Tim de Laat, Timo Siebenand
Exotic group -algebras are -algebras that lie between the universal and the reduced group -algebra of a locally compact group. We consider simple Lie groups with…
The Fourier algebra of a rigid -tensor category
Yuki Arano, Tim de Laat, Jonas Wahl
Completely positive and completely bounded mutlipliers on rigid -tensor categories were introduced by Popa and Vaes. Using these notions, we define and study the Fourier-…
Superexpanders from group actions on compact manifolds
Tim de Laat, Federico Vigolo
It is known that the expanders arising as increasing sequences of level sets of warped cones, as introduced by the second-named author, do not coarsely embed into a Banach space as…
Banach space actions and -spectral gap
Tim de Laat, Mikael de la Salle
Żuk proved that if a finitely generated group admits a Cayley graph such that the Laplacian on the links of this Cayley graph has a spectral gap , then the group has…
Howe-Moore type theorems for quantum groups and rigid C*-tensor categories
Yuki Arano, Tim de Laat, Jonas Wahl
We formulate and study Howe-Moore type properties in the setting of quantum groups and in the setting of rigid -tensor categories. We say that a rigid -tensor c…
On strong property (T) and fixed point properties for Lie groups
Tim de Laat, Masato Mimura, Mikael de la Salle
We consider certain strengthenings of property (T) relative to Banach spaces that are satisfied by high rank Lie groups. Let X be a Banach space for which, for all k, the Banach--M…
A complete characterization of connected Lie groups with the Approximation Property
Uffe Haagerup, Søren Knudby, Tim de Laat
We give a complete characterization of connected Lie groups with the Approximation Property for groups (AP). To this end, we introduce a strengthening of property (T), that we call…
Approximation properties for noncommutative -spaces of high rank lattices and nonembeddability of expanders
Tim de Laat, Mikael de la Salle
This article contains two rigidity type results for for large that share the same proof. Firstly, we prove that for every differe…
Strong property (T) for higher rank simple Lie groups
Tim de Laat, Mikael de la Salle
We prove that connected higher rank simple Lie groups have Lafforgue's strong property (T) with respect to a certain class of Banach spaces containing many class…
Simple Lie groups without the Approximation Property II
Uffe Haagerup, Tim de Laat
We prove that the universal covering group of does not have the Approximation Property (AP). Together with the f…
On the Grothendieck Theorem for jointly completely bounded bilinear forms
Tim de Laat
We show how the proof of the Grothendieck Theorem for jointly completely bounded bilinear forms on C*-algebras by Haagerup and Musat can be modified in such a way that the method o…
Approximation properties for noncommutative Lp-spaces associated with lattices in Lie groups
Tim de Laat
In 2010, Lafforgue and de la Salle gave examples of noncommutative Lp-spaces without the operator space approximation property (OAP) and, hence, without the completely bounded appr…
Simple Lie groups without the Approximation Property
Uffe Haagerup, Tim de Laat
For a locally compact group G, let A(G) denote its Fourier algebra, and let M_0A(G) denote the space of completely bounded Fourier multipliers on G. The group G is said to have the…
On the Regularization of the Kepler Problem
Gert Heckman, Tim de Laat
We show that for the Kepler problem the canonical Ligon-Schaaf regularization map can be understood in a straightforward manner as an adaptation of the Moser regularization. In tur…