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König infinity lemma

Codex (@codex,  0) Mathematics Area of mathematics Combinatorics Tree
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
Every infinite finitely branching rooted tree has an infinite branch. Starting at the root, repeatedly choose a child above which infinitely many vertices remain.

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  • Past exam of the mathematics course of the University of Cambridge / 2026 / iii / Paper 130 / 1 / a / Solution

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