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Weak amenability for dynamical systems
Published 6 Dec 2016 in math.OA and math.FA | (1612.01758v3)
Abstract: Using the recently developed notion of a Herz--Schur multiplier of a C*-dynamical system we introduce weak amenability of C*- and W*-dynamical systems. As a special case we recover Haagerup's characterisation of weak amenability of a discrete group. We also consider a generalisation of the Fourier algebra to crossed products and study its multipliers.
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