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LOGARITHMIC GROWTH FOR MATRIX MARTINGALE TRANSFORMS

Published online by Cambridge University Press:  30 January 2002

T. A. GILLESPIE
Affiliation:
Department of Mathematics and Statistics, University of Edinburgh, Edinburgh EH9 3JZ
S. POTT
Affiliation:
Department of Mathematics and Statistics, University of Edinburgh, Edinburgh EH9 3JZ
S. TREIL
Affiliation:
Department of Mathematics, Michigan State University, East Lansing, MI 48824, USA
A. VOLBERG
Affiliation:
Department of Mathematics, Michigan State University, East Lansing, MI 48824, USA
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Abstract

An example is given of an operator weight W that satisfies the dyadic operator Hunt–Muckenhoupt–Wheeden condition [Aopf ]d2 for which there exists a dyadic martingale transform on L2 (W) that is unbounded. The construction relates weighted boundedness to the boundedness of dyadic vector Hankel operators.

Type
Research Article
Copyright
London Mathematical Society 2001

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