I have assumed in the question that number of vertices of G is even, because if not, a clear counterexample is .
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Question 13. Prove that if k is odd and G is a k-regular (k - 1)-edge-connected graph, then G has a perfect matching Question 13. Prove that if k is odd and G is a k-regular (k - 1)-edge-connect...
6. Prove that the following graphs are connected: (a) The 3 vertex cycle: (b) The following 4 vertex graph: (c) K 7. An edge e of a connected graph G is called a cut edge if the graph G obtained by deleting that edge (V(G) V(G) and E(G) E(G) \<ej) is not connected. Prove that if G1 and G2 are connected simple graphs which are isomorphic and if G1 has a cut edge, then G2 also has a cut edge....
need help with a and b in this graph theory question Let n >k> 1 with n even and k odd. Make a k-regular graph G by putting n vertices in a circle and connecting each vertex to the exact a) Show that for all u,v there are k internally disjoint u, v-paths (you (b) Use the previous part, even if you did not prove it, to show that the e vertex and the k 1 closest vertices on either...
Let G be a connected graph with m 2 vertices of odd degree. Prove that once is m/2. Let G be a connected graph with m 2 vertices of odd degree. Prove that once is m/2.
Prove that, if even degree, then the edge conn G is a nontrivial connected graph in which every vertex has Prove that, if even degree, then the edge conn G is a nontrivial connected graph in which every vertex has
A graph is called d-regular if all vertices in the graph have degree d. Prove that a d-regular bipartite graph (for d ≥ 1) has a perfect matching. Furthermore, show that a d-regular bipartite graph is the disjoint union of d perfect matchings. Hint: The min-cut in an appropriate flow network can be useful in answering this question.
2. (a) Let G be a connected non-complete graph with order n 2 3 and diameter d. Prove that the connectivity K(G) of G satisfies d-1 (b) A connected graph is called unicyclic if it contains exactly one cycle. Prove that the edge-connectivity of any unicyclic graph is at most 2. 2. (a) Let G be a connected non-complete graph with order n 2 3 and diameter d. Prove that the connectivity K(G) of G satisfies d-1 (b) A connected...
Question 1# (a) Let G be a connected graph and C a non-trivial circuit in G. Prove directly that if an edge e fa, b is removed from C then the subgraph S C G that remains is still connected. "Directly' means using only the definitions of the concepts involved, in this case connected' and 'circuit'. Hint: If z and y are vertices of G connected by path that includes e, is there an alternative path connecting x to y...
Let G be a connected graph which is regular of degreer. Prove that the line graph of G, L(G), is Eulerian.
(a) Let L be a minimum edge-cut in a connected graph G with at least two vertices. Prove that G − L has exactly two components. (b) Let G an eulerian graph. Prove that λ(G) is even.
please give me the complete prove for this question : Prove that if G is a k-edge-connected graph, then G∨K1 is (k +1)-edge-connected.