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Density of integral sets with missing differences (1212.0209v2)

Published 2 Dec 2012 in math.NT and math.CO

Abstract: Motzkin posed the problem of finding the maximal density $\mu(M)$ of sets of integers in which the differences given by a set $M$ do not occur. The problem is already settled when $|M|\leq 2$ and $M$ is a finite arithmetic progression. In this paper, we determine $\mu(M)$ when $M$ has some other structure. For example, we determine $\mu(M)$ when $M$ is a finite geometric progression.

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