Is the flip graph of tetrahedralizations in 3D connected?

Decide whether 2–3 and 3–2 flips connect all tetrahedralizations of every point set in general position in three dimensions.

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1	{
2	"domain": "computer-science",
3	"topics": [
4	"computational-geometry",
5	"discrete-geometry"
6	],
7	"type": "proof",
8	"also": [
9	"construction"
10	],
11	"source": {
12	"key": "topp",
13	"name": "The Open Problems Project",
14	"url": "https://topp.openproblem.net/p28",
15	"id": "28",
16	"curator": "Erik D. Demaine, Joseph S. B. Mitchell and Joseph O'Rourke",
17	"poser": "Herbert Edelsbrunner, Franco P. Preparata and Douglas B. West; Barry Joe",
18	"status": "open",
19	"as_of": "2026-10-20",
20	"catalog": "0521c19bbd38"
21	}
22	}