If G is a (not necessarily simple) graph with n vertices where each vertex has degree greater than or equal to (n−1)/2, is the diameter of G necessarily 2 or less? Either prove that the answer to this question is "yes" or give a counterexample.

Q: Let G = (V, E) be a planar graph such that |V |< 19. Show that if the length of the shortest cycle…

A: For a given graph G=V,E where V≤19 that shortest cycle in G is 5, then we need to prove that G has a…

Q: A simple graph G on n vertices with m edges is overfull if m> [n/2]A. Show that if G is overfull,…

A: Given that: A simple graph G on n vertices with m edges is overfull if m&gt;n2△. The objective is to…

Q: Let H be a graph If H has at least one vertex of degree greater than zero then there are two of even…

A: Given a graph representing H. Statement: If H has at least one vertex of degree greater than zero…

Q: Let G be a simple graph on 9 vertices, and assume we know that the sum of all degrees in G is at…

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Q: Prove (Menger) if x, y are vertices of a graph G and xy e E(G), then the minimum size of an x,y-cut…

A: Proof: The proof uses induction on n. The theorem is trivial for n=1. Suppose x and y are separated…

Q: Consider the problem Q defined below. Prove whether or not problem Q is in NP An undirected graph…

A: Given an undirected graph G(V, E) and a positive integer k.

Q: Can we draw a planar graph with n= 7 and e = 12 such that each region is bounded by exactly 3-edges…

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Q: Count the number of vertices, edges, and faces, and then verify Euler's Formula for the given graph.

A: Given the graph we have to calculate the number of vertices, edges and faces then verify the Euler’s…

Q: (i) Use Euler's formula to prove that, if G is a connected planar graph of girth 5 with n vertices…

A: According to the given information, for part (i) it is required to prove that if G is connected…

Q: Consider the 4-vertex graph G associated with the Seven Bridges of Königsberg problem from the…

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Q: Let G be a (p, q) graph. Prove that the sum of the degrees of the vertices of G equals twice the…

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Q: a) Show that if G is a simple graph with n vertices (where n is a positive integer) and each vertex…

A: Part(a): G is a simple graph with n vertices and degree of each vertex in G is at least n-12. We…

Q: Suppose that the edges of Kn are weighted-- what is the largest number of edges that cou be in the…

A: We will use the method of combinatorics to answer this question.

Q: Determine the largest positive integer k such that χ(H) = χ(G) = k, where H is obtained from a…

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Q: Suppose a planar graph G is not connected and has exactly 2 components. What is the value of n – m+…

A: To obtain the result, use Euler's formula for planar graphs. Let G be a connected planar graph with…

Q: Prove that every graph G with n vertices and chromatic number k = x(G) has at most · (n2 – ) edges.…

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Q: Prove that for every odd n ≥ 5 there exist a graph of n+1 vertices n of which have degree 3, and the…

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Q: 9. Verify that Euler's formula does not hold for a graph that is not connected: count the vertices,…

A: The given question is related with graph theory. We have to verify that Euler's formula does not…

Q: Consider the following graph. V5 (V3 V4 V2 eg V6 V1 Compute the degree of each vertex. V1 V2 V3 4 V5…

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Q: Show that if G is a simple graph with n vertices (where n is a positive integer) and each vertex has…

A: Hello. Since your question has multiple parts, we will solve first question for you. If you want…

Q: 8. 1 Use Kuratowski's theorem to prove that the following graph is not planar.

A: To Prove- Use Kuratowski's Theorem to prove that the following graph is not planar.   Theorem used-…

Q: If J has at least one vertex of degree greater than zero then there are two of even degree as long…

A: This is a problem of Graph Theory.

Q: Which of the following graphs are bipartite? I

A: A graph is bipartite iff graph does not contains any odd cycle.

Q: Let G be a connected graph of order n = 4 and let k be an integer with 2 ≤ k ≤ n − 2. a)Prove that…

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Q: Let P be a path graph with n2 4 vertices. What is the length of a longest path in the complement of…

A: In the given question, concept of graph theory is applied. Graph Theory A graph is a figure made up…

Q: For any connected graph G of order 55, if x is a vertex of G, then the number of components of G-x…

A: A connected graph is graph that is connected in the sense of a topological space, i.e., there is a…

Q: If G is a graph, then the sum of its vertex degrees is nonnegative and even.

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Q: Let G be a planar graph. Use Euler's Formula to prove that G must have a vertex of degree 5 or less.…

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Q: State whether the following statement is true or false. Justify your answer with a short proof or a…

A: Consider the general case, Let G be k-edge connected graph then we shall rove that G is k connected.…

Q: Show that for a bipartite graph G we always have w(G) = x(G).

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Q: Prove that every simple graph G= (V, E) with |V] > 2 has at least two vertices of equal degree. %3D…

A: We have a simple graph, with V≥2, that is, the number of vertices is greater than or equal to 2.…

Q: If G has at least one vertex of degree greater than zero then there are two of even degree as long…

A: This is the problem of graph theory.

Q: The following graphs are bipartite graphs, except 1. O 2. O a 3. O

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Q: Suppose the graph is planar but not connected, and has 5 components. Derive a variant of Euler's…

A: As per the question we have to derive an alternate Euler's formula in case of planar but not…

Q: If a graph with six vertices is embedded in S², what is the maximum number of edges it can have.…

A: I have Provided this answer in step-2.

Q: Prove that the following graph μ is bipartite. w V u fl a b с

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Q: 12. If G is a simple graph with vertices a, b, c, d, e and d(a) = d(b) = d(c) = 3 (d = degree), then…

A: Here we apply Hand-shaking lemma for simple graph.

Q: b) Determine whether there is an Euler trail from vzto V6 in the following graph. If there is, find…

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Q: For the given graph G, which of the following statements is false? A B) (F a) G is a simple directed…

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Q: Prove that in any simple graph G with n vertices and m edges, 2m ≤ n^2 − n.

A: We need to prove that in any simple graph G with n vertices and m edges, 2m≤n2−n

Q: Which of the following graphs contain a subdivision of K3,3 as a subgraph

A: The solution is given below in detail in which we found no graph contains a subdivision of K3, 3 1)

Q: The number of edges in a complete bi-partite graph Km.n is equal to n2 whenever а. m>n O b. m< n. O…

A: Since we know that "The number of edges in a complete bi-partite graph Km,n is equal to mn ".

Q: Let G be a graph with v vertices and e edges. Let M be the maximum degree of the vertices of G, and…

A: We are given a G graph G with v number of vertices and e number of edges in the graph. we are also…

Q: (3) Determine whether or not each of the following graphs is planar. If planar, show a planar…

A: As per our company guidelines, we can solve one question at a time. If you want other question to be…

Q: prove that the degree of a regular complete tripartite graph kr,s,t with n vertices is given by 2n/3

A: Since the graph is tripartite with vertex division of r, s, t, we have three clusters of vertices…