{ "domain": "mathematics", "topics": [ "discrete-geometry", "combinatorics" ], "type": "construction", "source": { "key": "frontiermath-open", "name": "FrontierMath: Open Problems", "url": "https://epoch.ai/frontiermath/open-problems/heesch-number", "id": "heesch-number", "curator": "Epoch AI", "poser": "Heinrich Heesch", "status": "unsolved", "as_of": "2026-10-20", "catalog": "0521c19bbd38" } }