Erdős problem 1210Let A⊆[1,n)A\subseteq [1,n) be a set of integers such that (a,b)=1(a,b)=1 for all distinct a,b∈Aa,b\in A. Is it true that ∑a∈A1n−a≤∑p<n1p+O(1)\sum_{a\in A}\frac{1}{n-a}\leq \sum_{p < n}\frac{1}{p}+O(1)?WorkspaceContinue locallyOpen sourceSign in to contributeOpen this exact Problem, source revision, and authority Repository in Workbench. This handoff does not clone, switch, upload, or execute anything.FilesErdős problem 12103 retained source recordsCanvaspublic previewSource#1210→ResultNone→Checks0