The Erdős matching conjecture

Determine the largest r-uniform hypergraph on n vertices with no k disjoint edges; Erdős conjectured one of two simple families wins.

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1	{
2	"domain": "mathematics",
3	"topics": [
4	"combinatorics",
5	"graph-theory"
6	],
7	"type": "construction",
8	"also": [
9	"proof"
10	],
11	"source": {
12	"key": "erdos",
13	"name": "Erdős Problems",
14	"url": "https://www.erdosproblems.com/1020",
15	"id": "1020",
16	"curator": "Thomas Bloom",
17	"poser": "Paul Erdős",
18	"status": "open",
19	"as_of": "2026-10-20",
20	"catalog": "0521c19bbd38"
21	},
22	"review": true,
23	"approval": "first-time"
24	}