Multilinear Fourier multipliers of a locally compact group

In his paper "Group C*-algebras without the completely bounded approximation property", Haagerup proves several important results about the weak amenability of locally compact groups. Among these, is the result that a lattice in a second-countable, unimodular, locally compact group is weakly amenable if and only if the surrounding group itself...

The CCAP for graph products of operator algebras

For a simple graph Γ and for unital C^*-algebras with GNS-faithful states (A_v,φ_v) for v∈VΓ, we consider the reduced graph product (A,φ)=⁎_v,Γ(A_v,φ_v), and show that if every C^*-algebra A_v has the completely contractive approximation property (CCAP) and...