9-13 June 2013
Koper, Slovenia
UTC timezone
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Singular integrals, rectifiability, and the David-Semmes problem

Presented by Prof. Xavier TOLSA
Type: Oral presentation
Track: Plenary Talk


The notion of rectifiability plays an essential role in the L^2 boundedness of some important operators arising in complex and harmonic analysis, such as the Cauchy and Riesz transforms. Indeed, by a well known result of David, it turns out that the Cauchy transform originates an operator bounded in L^2 with respect to the arc length measure on (AD regular) rectifiable curves of the plane. In the converse direction, the L^2 boundedness of the Cauchy transform with respect to arc length on a set E implies the rectifiability of E. In this talk I will report on analogous results concerning the n-dimensional Riesz transform in R^{n+1} which are due to Nazarov, Tolsa and Volberg. These results have applications to the characterization of the removable singularities for Lipschitz harmonic functions in R^{n+1}.


Location: Koper, Slovenia

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