Bulletin of the London Mathematical Society Advance Access published online on April 23, 2008
Bulletin of the London Mathematical Society, doi:10.1112/blms/bdn022
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© 2008 London Mathematical Society
Haar type and Carleson constants
Department of Mathematics and Statistics
University of Jyväskylä
PO Box 35 (MaD)
FIN-40014
Finland
Department of Analysis
J.Kepler University
A-4040 Linz
Austria
Received 26 February 2007. Revision received 5 January 2007.
For a collection
of dyadic intervals, a Banach space X, and p
(1, 2], we assume the upper
p estimates
where xI
X, and hI denotes the L
normalized Haar function supported on I. We determine the minimal requirement on the size of
such that these estimates imply that X is of Haar type p. The characterization is given in terms of the Carleson constant of
.
2000 Mathematics Subject Classification 46B07, 46B20.
Research of both authors supported in part by FWF Pr. Nr. P150907-N01.