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Chapter 4: Problem 8

Do you think it is possible for a minimum spanning tree to have a cycle? Justify your answer.

Short Answer

Expert verified
No, a minimum spanning tree cannot contain a cycle, because by definition a tree, including a minimum spanning tree, is acyclic.

Step by step solution

01

Understanding Graphs and Trees

In graph theory, a graph consists of vertices (or nodes), and edges (or arcs) connecting these vertices. A tree is a special type of a graph which is minimally connected (meaning there exists a path from any node to any other node) and has no cycles (which would imply that there is more than one path from at least one node to another).
02

Understand Minimum Spanning Trees

A minimum spanning tree (MST) of a graph is a subset of the edges of the graph that forms a tree and includes every vertex, with the total weight of all the edges in the tree being the smallest possible. Given that an MST is a tree, it is minimally connected and it inherently does not contain a cycle.
03

Conclude the answer

By the definition of a tree in graph theory, and the assumption that a minimum spanning tree, being a tree, therefore contains no cycles, you can conclude that, no, a minimum spanning tree cannot have a cycle.

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