Let T be a tree with n vertices. Let k be the maximum degree of a vertex of T. Let l be the length of the longest path in T. Prove that l ≤ n − k +1.
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- Let P₁ and P₂ be two paths of maximum length in a connected graph G. Prove that P₁ and P2 have a common vertex.1a. Prove: every tree with n ≥ 2 vertices has at least 2 leaves. (3 pt) 1b. Let T be a tree. Prove: if all vertices have degree either 1 or at least 4, then T has at least 2(n + 1)/3 leaves. (4 pt)Let G be a graph with v vertices and e edges. Let M be the maximum degree of the vertices of G, and let m be the minimum degree of the vertices of G. Show that 2e/v≥m
- Solve 5b1. (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.)I want this to be considered as a Advanced Math question pls. . Consider a graph G which is a complete bipartite graph. The graph G is defined as K(3,4), meaning it has two sets of vertices, with 3 vertices in one set and 4 in the other. Every vertex in one set is connected to every vertex in the other set, but there are no connections within a set. Calculate the number of edges in graph G. Also, determine if the graph G contains an Euler path or circuit, and justify your answer.
- Let T be a tree with p vertices of degree 1 and q other vertices. Show that the sum of the degrees of the vertices of degree greater than 1 is p+2(q-1).A tournament is a digraph whose underlying graph is a complete graph. A root of a digraph is a vertex from which every vertex is reachable. A king of a digraph is a vertex u such that d(u,v)2 for every vertex v. Prove that every tournament has a root. Prove that every tournament has a king.Discrete MAth Graph Theory and spanning tree Let G be a connected graph, and let T1, T2 be two spanning trees. Prove that T1 can be transformed to T2 by a sequence of intermediate trees, each obtained by deleting an edge from the previous tree and adding another.
- Show that For n > 1 let Gn be the simple graph with vertex set V(Gn) = {1,2, ., n} in which two different vertices i and j are adjacent whenever j is a multiple of i or i is a multiple of j. For what n is Gn planar? ...1A graph is bipartite if its vertex set can be partitioned into two sets V₁ and V2 such all edges are between V₁ and V2 (i.e. there are no edges joining vertices inside V₁, and the same for V2). (a) Draw a bipartite graph with 5 vertices and 5 edges. (b) What is the maximum number of edges for a bipartite graph with 2n vertices (suppose n > 1)?Need help with this question. Please explain each step and neatly type up. Thank you :)