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LOGARITHMIC GROWTH FOR MATRIX MARTINGALE TRANSFORMS

T. A. GILLESPIE, S. POTT, S. TREIL, A. VOLBERG

Source record

Source: Crossref

Published: Dec 1, 2001

DOI: 10.1112/s0024610701002599

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Source abstract

An example is given of an operator weight W that satisfies the dyadic operator Hunt–Muckenhoupt–Wheeden condition [Aopf ] d 2 for which there exists a dyadic martingale transform on L 2 ( W ) that is unbounded. The construction relates weighted boundedness to the boundedness of dyadic vector Hankel operators.

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