{"schema":"vela.problem-packet.v0.1","problem":257,"statement":"Let $A\\subseteq \\mathbb{N}$ be an infinite set. Is\\[\\sum_{n\\in A}\\frac{1}{2^n-1}\\]irrational?","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)"}