F-finite embeddabilities of sets and ultrafilters

Lorenzo Luperi Baglini

Let $S$ be a semigroup, let $n\in \mathbb{N}$ be a positive natural number, let $A,B\subseteq S$, let $\mathcal{U},\mathcal{V}\in \beta S$ and let let $\mathcal{F}\subseteq\{f:S^{n}\right…