Journal of the London Mathematical Society Advance Access originally published online on February 26, 2008
Journal of the London Mathematical Society 2008 77(2):524-544; doi:10.1112/jlms/jdm114
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© 2008 London Mathematical Society
BMO from dyadic BMO on the bidisc
Department of Mathematics
Brown University
Providence, RI 02912
USA
Department of Mathematics
Harvey Mudd College
Claremont, CA 91711
USA
ward@math.hmc.edu
We generalize to the bidisc a theorem of Garnett and Jones relating the space BMO of functions of bounded mean oscillation to its martingale counterpart, dyadic BMO. Namely, translation-averages of suitable families of dyadic BMO functions belong to BMO. As a corollary, we deduce a biparameter version of a theorem of Burgess Davis connecting the Hardy space H1 to martingale H1. We also prove the analogs of the theorem of Garnett and Jones in the one-parameter and biparameter VMO spaces of functions of vanishing mean oscillation.
The first author was supported by the NSF under grant number DMS0600389, and by a Mellon Faculty Career Enhancement Grant. The second author was supported by a Mellon Faculty Career Enhancement Grant.
2000 Mathematics Subject Classification 42B35 (primary), 42B30 (secondary).
Received May 31, 2006; revised September 3, 2007; published online February 26, 2008.