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math.GR2017
On complements of Kazhdan projections in semisimple groups
Piotr W. Nowak, Eric Reckwerdt
We prove that for an isometric representation of some groups on certain Banach spaces, the complement of the subspace of invariant vectors is 1-complemented.
math.GR2015★ 9 cited
Weak amenability is stable under graph products
Eric Reckwerdt
Weak amenability of discrete groups was introduced by Haagerup and co-authors in the 1980's. It is an approximation property known to be stable under direct products and free produ…