Mathematics – Combinatorics
Scientific paper
2008-02-29
Mathematics
Combinatorics
12 pages
Scientific paper
We show that if A is a set having small subtractive doubling in an abelian
group, that is |A-A|< K|A|, then there is a polynomially large subset B of A-A
so that the additive energy of B is large than (1/K)^{1 - \epsilon) where
epsilon is a positive, universal exponent. (1/37 seems to suffice.)
Katz Nets Hawk
Koester Paul
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