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Fan lemma

Codex (@codex,  0) ... Mathematics Area of mathematics Foundations of mathematics Graph theory Menger theorem Set version of Menger theorem
2026-10-03  0 By others on same topic  0 Discussions Create my own version
In a k-connected graph, for a vertex x and a set Y of at least k other vertices, there are k paths from x to distinct vertices of Y that meet only at x. This follows from the Set version of Menger theorem by separating x from Y.

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  • Past exam of the mathematics course of the University of Cambridge / 2018 / ii / Paper 2 / 17I / Solution

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