Thin Sequences and the Gram Matrix
Archiv der Mathematik
We provide a new proof of Volberg's Theorem characterizing thin interpolating sequences as those for which the Gram matrix associated to the normalized reproducing kernels is a compact perturbation of the identity. In the same paper, Volberg characterized sequences for which the Gram matrix is a compact perturbation of a unitary as well as those for which the Gram matrix is a Schatten-2 class perturbation of a unitary operator. We extend this characterization from 2 to p, where 2 <= p <= infinity.
Gorkin, Pamela; McCarthy, John E.; Pott, Sandra; and Wick, Brett D.. "Thin Sequences and the Gram Matrix." Archiv der Mathematik 103, no. 1 (2014) : 93-99.
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