{"schema":"vela.problem-packet.v0.1","problem":947,"statement":"There is no exact covering system - that is, a finite collection of congruence classes $a_i\\pmod{n_i}$ with distinct $n_i$ such that every integer satisfies exactly one of these congruence classes.","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)"}