{"schema":"vela.problem-packet.v0.1","problem":198,"statement":"If $A\\subset \\mathbb{N}$ is a Sidon set then must the complement of $A$ contain an infinite arithmetic progression?","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)"}