How to find the diameter of a cayley tree in terms of number of vertex?
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We give a new proof of Cayley's formula, which states that the number of labeled trees on n nodes is nn−2. This proof uses a difficult combinatorial identity, and it could equally well be regarded as a proof of this identity that uses Cayley's formula. The proof proceeds by counting labeled rooted trees with n vertices and j improper edges, where an improper edge is one whose endpoint closer to the root has a larger label than some vertex in the subtree rooted on the edge.⤵⤵⤵⤵
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