International Mathematics Research Notices ( IF 1.452 ) Pub Date : 2020-01-13 , DOI: 10.1093/imrn/rnz360
Guth L, Katz N, Zahl J.

We give a new proof of the discretized ring theorem for sets of real numbers. As a special case, we show that if $A\subset \mathbb{R}$ is a $(\delta ,1/2)_1$-set in the sense of Katz and Tao, then either $A+A$ or $A.A$ must have measure at least $|A|^{1-\frac{1}{68}}$.

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