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math.CO2024
Weak Freiman isomorphisms and sequencings of small sets
Simone Costa, Stefano Della Fiore
In this paper, we introduce a weakening of the Freiman isomorphisms between subsets of non necessarily abelian groups. Inspired by the breakthrough result of Kravitz, [14], on cycl…
math.CO2024
Variants of the Erdős distinct sums problem and variance method
Simone Costa, Stefano Della Fiore, Andrea Ferraguti
Let be a set of positive integers with such that all subset sums are pairwise distinct. A famous conjecture of Erdős states tha…