{
  "domain": "physics-astronomy",
  "topics": [
    "mathematical-physics"
  ],
  "type": "proof",
  "source": {
    "key": "simon-problems",
    "name": "Simon's problems in mathematical physics",
    "url": "https://en.wikipedia.org/wiki/Simon_problems#The_2000_list",
    "id": "2000-9",
    "curator": "Barry Simon",
    "poser": "Barry Simon",
    "status": "open",
    "as_of": "2026-10-20",
    "catalog": "0521c19bbd38"
  },
  "review": true,
  "approval": "first-time"
}