62 citations
- École Polytechnique Fédérale de LausanneCH1 paper
- Haute École Pédagogique du Canton de VaudCH1 paper
- Institut Montpelliérain Alexander GrothendieckFR1 paper
- Istituto Nazionale per la Fisica della MateriaIT1 paper
- Université Toulouse III - Paul SabatierFR1 paper
- University of CataniaIT1 paper
- University of LausanneCH1 paper
7 papers
Moyennabilite interieure et extensions HNN
Yves Stalder
We present sufficient conditions for HNN extensions to be inner amenable, respectively ICC, which give necessary and sufficient criteria among Baumslag-Solitar groups. We deduce th…
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.…
Bas du spectre et delta-hyperbolicité en géométrie de Hilbert plane
Bruno Colbois, Constantin Vernicos
We prove that the Hilbert geometry of a convex domain in the plane is Gromov hyperbolic, if, and only if, the bottom of its spectrum is not zero
Vertex-reinforced random walk on Z eventually gets stuck on five points
Pierre Tarres
Vertex-reinforced random walk (VRRW), defined by Pemantle in 1988, is a random process that takes values in the vertex set of a graph G, which is more likely to visit vertices it h…
Linear response theory around a localized impurity in the pseudogap regime of an anisotropic superconductor: precursor pairing vs the d-density-wave scenario
N. Andrenacci, G. G. N. Angilella, H. Beck +1
We derive the polarizability of an electron system in (i) the superconducting phase, with d-wave symmetry, (ii) the pseudogap regime, within the precursor pairing scenario, and (ii…
On simultaneous binary expansions of and
Giuseppe Melfi
A new family of sequences is proposed. An example of sequence of this family is more accurately studied. This sequence is composed by the integers for which the sum of binary d…