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math.FA2008
Duality in spaces of finite linear combinations of atoms
Fulvio Ricci, Joan Verdera
In this note we describe the dual and the completion of the space of finite linear combinations of -atoms, on . As an application, we show an…
math.CA2008
Extra cancellation of even Calderon-Zygmund operators and quasiconformal mappings
Joan Mateu, Joan Orobitg, Joan Verdera
We discuss a special class of Beltrami coefficients whose associated quasiconformal mapping is bilipschitz. These are of the form the characteristic function of a planar bounded do…