Mathematics – Classical Analysis and ODEs
Scientific paper
2008-07-31
Online J. Anal. Comb. No. 5 (2010), Art. 6, 4 pp
Mathematics
Classical Analysis and ODEs
5 pp. Included refinement from c^{1/2} to c^{1/3}, independently discovered by Shkredov and Yekhanin in arXiv:1004.2294. Corre
Scientific paper
We show that if A is a finite subset of an abelian group with additive energy
at least c|A|^3 then there is a subset L of A with |L|=O(c^{-1}\log |A|) such
that |A \cap Span(L)| >> c^{1/3}|A|.
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