(Prunes) Prove that if G is a tree with a vertex of degree d, then it has at least d leaves.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
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Chapter3: Matrices
Section3.7: Applications
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1. (Prunes) Prove that if G is a tree with a vertex of degree d, then it
has at least d leaves.
2. (Two paths) Prove that in every tree T, any two paths of marimum
length have a node in common. (I.e. if vo, v1, . .., Vk and wo, w1, ..., Wk
are paths of maximum length in a tree T, then there are integers
i, je {0, 1, ..., k} such that v; = wj.)
Transcribed Image Text:1. (Prunes) Prove that if G is a tree with a vertex of degree d, then it has at least d leaves. 2. (Two paths) Prove that in every tree T, any two paths of marimum length have a node in common. (I.e. if vo, v1, . .., Vk and wo, w1, ..., Wk are paths of maximum length in a tree T, then there are integers i, je {0, 1, ..., k} such that v; = wj.)
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