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Hausdorff dimension and distance sets. (English) Zbl 0807.28004

The author uses a brilliant refinement of Fourier restriction phenomena to spheres to improve results on difference sets \(D(A)= \{| x- y|; x,y\in A\}\) for Souslin sets \(A\) in \(\mathbb{R}^ n\) due to Falconer. For example, if \(A\subset \mathbb{R}^ 2\) and the Hausdorff dimension \(\dim A> {13\over 9}\) (instead of \({3\over 2}\) as in Falconer’s general result) then \(D(A)\) has positive measure.

MSC:

28A78 Hausdorff and packing measures
43A60 Almost periodic functions on groups and semigroups and their generalizations (recurrent functions, distal functions, etc.); almost automorphic functions
Full Text: DOI

References:

[1] Bourgain, J., Besicovitch type maximal functions and applications to Fourier analysis, Geometric and Functional Analysis, 1, 147-187 (1991) · Zbl 0756.42014 · doi:10.1007/BF01896376
[2] Bourgain, J., On the restriction and multiplier problems in ℝ^3, 179-191 (1991), Berlin: Springer-Verlag, Berlin · Zbl 0792.42004
[3] Falconer, K., On the Hausdorff dimension of distance sets, Mathematika, 32, 206-212 (1985) · Zbl 0605.28005
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