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If $A+A$ is small then $AAA$ is superquadratic. (arXiv:1810.10842v1 [math.CO])
This note proves that there exists positive constants $c_1$ and $c_2$ such
that for all finite $A \subset \mathbb R$ with $|A+A| \leq |A|^{1+c_1}$ we have
$|AAA| \gg |A|^{2+c_2}$.查看全文
