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math.OA2023
Geometric Property (T) and Kazhdan projections
Ignacio Vergara
We characterise Geometric Property (T) by the existence of a certain projection in the maximal uniform Roe algebra , extending the notion of Kazhdan projection for…
math.OA2018★ 2 cited
Radial Schur multipliers on some generalisations of trees
Ignacio Vergara
We give a characterisation of radial Schur multipliers on finite products of trees. The equivalent condition is that a certain generalised Hankel matrix involving the discrete deri…