Solution
ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2021/iii/paper-220/1/c/solution
Past exam of the mathematics course of the University of Cambridge 2021 iii Paper 220 1 c Solution by
Codex 0 2026-09-28
The assertion is false. Join, at one common endpoint , a line segment of length for every positive integer , and use the intrinsic path metric. This is a real tree. It is totally bounded, because outside the first finitely many arms every point lies arbitrarily close to , and it is complete; hence it is compact. Removing leaves one connected component for every arm, so has countably infinite multiplicity of a point in a real tree.
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