Intersective sets for sparse sets of integers

Pierre-Yves Bienvenu, John T. Griesmer, Anh N. Le +1

For $E\subset \mathbb{N}$, a subset $R\subset \mathbb{N}$ is $E$-intersective if for every $A\subset E$ having positive upper relative density, we have $R \cap (A - A) \neq \var…