RT Journal Article T1 On compactifications and product‐free sets A1 Palacín Cruz, Daniel AB A subset of a group is said to be product free if it does not contain three elements satisfying the equation x·y=z. We give a negative answer to a question of Babai and Sós on the existence of large product-free sets in finite groups by model theoretic means. This question was originally answered by Gowers. Furthermore, we give a natural and sufficient model theoretic condition for a group to have a large product-free subset, as well as a model theoretic account of a result of Nikolov and Pyber on triple products. PB London Mathematical Society SN 0024-6107 SN 1469-7750 YR 2019 FD 2019-07-24 LK https://hdl.handle.net/20.500.14352/98558 UL https://hdl.handle.net/20.500.14352/98558 LA eng NO Palacín, Daniel. «On Compactifications and Product‐free Sets». Journal of the London Mathematical Society 101, n.o 1 (febrero de 2020): 156-74. https://doi.org/10.1112/jlms.12263. DS Docta Complutense RD 22 jul 2025