{"schema":"vela.problem-packet.v0.1","problem":332,"statement":"Let $A\\subseteq \\mathbb{N}$ and $D(A)$ be the set of those numbers which occur infinitely often as $a_1-a_2$ with $a_1,a_2\\in A$. What conditions on $A$ are sufficient to ensure $D(A)$ has bounded gaps?","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)"}