{"schema":"vela.problem-packet.v0.1","problem":1194,"statement":"Let $A\\subset\\mathbb{N}$ be such that every integer $n\\geq 1$ can be written uniquely as $a_n-b_n$ for some $a_n,b_n\\in A$. How fast must $a_n/n$ increase?","status":"open","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)"}