Lp estimates for the biest I. The Walsh case
Camil Muscalu, Terence Tao, Christoph Thiele
Abstract
We prove Lp estimates for the Walsh model of the "biest", a trilinear multiplier with singular symbol which arises naturally in the expansion of eigenfunctions of a Schrodinger operator, and which is also related to the bilinear Hilbert transform. The corresponding estimates for the Fourier model will be obtained in the sequel of this paper.
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