no. 3
On sum-sets and product-sets of complex numbers
Journal de Théorie des Nombres de Bordeaux, Tome 17 (2005) no. 3, pp. 921-924.

On donne une preuve simple que pour tout ensemble fini de nombres complexes A, la taille de l’ensemble de sommes A+A ou celle de l’ensemble de produits A·A est toujours grande.

We give a simple argument that for any finite set of complex numbers A, the size of the the sum-set, A+A, or the product-set, A·A, is always large.

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Solymosi, József. On sum-sets and product-sets of complex numbers. Journal de Théorie des Nombres de Bordeaux, Tome 17 (2005) no. 3, pp. 921-924. doi : 10.5802/jtnb.527. http://www.numdam.org/articles/10.5802/jtnb.527/

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