Erdős problem 955If A⊂NA\subset \mathbb{N} has density 00 then s−1(A)s^{-1}(A) must also have density 00.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 95513 retained source recordsCanvaspublic previewSource#955→ResultNone→Checks0