21,789 followers
RT @archernikov: Erdős and Szemerédi observed the following remarkable "sum-product" phenomenon: there is some constant c>0 such that for a…
RT @archernikov: Erdős and Szemerédi observed the following remarkable "sum-product" phenomenon: there is some constant c>0 such that for a…
Erdős and Szemerédi observed the following remarkable "sum-product" phenomenon: there is some constant c>0 such that for any finite set A of reals, max{|A+A|, |A·A|} > |A|^(1+c). 1/n https://t.co/t6rQAbJTLR