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math.CO2003
On the size of -fold sum and product sets of integers
Jean Bourgain, Mei-Chu Chang
We prove the following theorem: for all positive integers there exists a positive integer , such that for every finite set of integers with cardinality , we hav…
math.CO2003
A sum-product estimate in finite fields, and applications
Jean Bourgain, Nets Katz, Terence Tao
Let be a subset of a finite field for some prime . If for some , then we prove the estimate $|A+A| + |A.A| \geq c(δ) |A|^{1+\eps…