{"schema":"vela.problem-packet.v0.1","problem":298,"statement":"Does every set $A\\subseteq \\mathbb{N}$ of positive density contain some finite $S\\subset A$ such that $\\sum_{n\\in S}\\frac{1}{n}=1$?","status":"solved","seam":"raw","closureRoutes":[],"obligations":[],"attestations":[],"attempts":[],"velaLean":[],"oeis":[],"generated_note":"derived view; the signed event log is the source of truth (vela check / vela reproduce)"}