General unfoldings of nonconvex polyhedra

Decide whether every polyhedron can be cut open, with cuts anywhere on its surface, and flattened into one non-overlapping piece.

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File it in the catalog (shoal-catalog 0521c19bbd38)

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	1	+{
	2	+ "domain": "computer-science",
	3	+ "topics": [
	4	+ "computational-geometry",
	5	+ "discrete-geometry"
	6	+ ],
	7	+ "type": "proof",
	8	+ "also": [
	9	+ "algorithm"
	10	+ ],
	11	+ "cover": {
	12	+ "motif": "polyhedron"
	13	+ },
	14	+ "source": {
	15	+ "key": "topp",
	16	+ "name": "The Open Problems Project",
	17	+ "url": "https://topp.openproblem.net/p43",
	18	+ "id": "43",
	19	+ "curator": "Erik D. Demaine, Joseph S. B. Mitchell and Joseph O'Rourke",
	20	+ "status": "open",
	21	+ "as_of": "2026-10-20",
	22	+ "catalog": "0521c19bbd38"
	23	+ }
	24	+}