a) Let M be a matching in a graph G such that G has no M-augmenting path. Show that M is a maximum matching. Let G be a bipartite graph with bipartition (X,Y). For SCX, let Ej be the set of edges in G incident on some vertex in S, and let E2 be the set of edges in G incident with some vertex in N(S). Is it true in general that E¡ C E2? Why? Prove that if G is a graph with no isolated vertices, then a'(G)+B'(G) = n(G) b) d) Which of the following is true ? Justify. i) Every tree has a perfect matching. ii) Every tree has at most one perfact matching.
a) Let M be a matching in a graph G such that G has no M-augmenting path. Show that M is a maximum matching. Let G be a bipartite graph with bipartition (X,Y). For SCX, let Ej be the set of edges in G incident on some vertex in S, and let E2 be the set of edges in G incident with some vertex in N(S). Is it true in general that E¡ C E2? Why? Prove that if G is a graph with no isolated vertices, then a'(G)+B'(G) = n(G) b) d) Which of the following is true ? Justify. i) Every tree has a perfect matching. ii) Every tree has at most one perfact matching.
Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter3: Matrices
Section3.7: Applications
Problem 74EQ
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