Arithmetic Structure in Sparse Difference Sets

Details Arithmetic Structure in Sparse Difference Sets Arithmetic Structure in Sparse Difference Sets

2010-04-15

arxiv.org/abs/1004.2723v1

Mathematics

Number Theory

7 pages, to appear in the Journal of Number Theory.

Scientific paper

Using a slight modification of an argument of Croot, Ruzsa and Schoen we establish a quantitative result on the existence of a dilated copy of any given configuration of integer points in sparse difference sets. More precisely, given any configuration $\{v_1,...,v_\ell\}$ of vectors in $\mathbb{Z}^d$, we show that if $A\subset[1,N]^d$ with $|A|/N^d\geq C N^{-1/\ell}$, then there necessarily exists $r\ne0$ such that $\{rv_1, ...,rv_\ell\}\subseteq A-A$.

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