Mathematics – Classical Analysis and ODEs
Scientific paper
2012-03-26
Mathematics
Classical Analysis and ODEs
32 pages, 5 figures
Scientific paper
Certain vector-valued inequalities are shown to hold for a Walsh analog of the bilinear Hilbert transform. These extensions are phrased in terms of a recent notion of quartile type of a UMD (Unconditional Martingale Differences) Banach space X. Every known UMD Banach space has finite quartile type, and it was recently shown that the Walsh analog of Carleson's Theorem holds under a closely related assumption of finite tile type. For a Walsh model of the bilinear Hilbert transform however, the quartile type should be sufficiently close to that of a Hilbert space for our results to hold. A full set of inequalities is quantified in terms of quartile type.
Hytönen Tuomas P.
Lacey Michael T.
Parissis Ioannis
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