A cycle exists in a graph when there is a nonempty path in which only
the first and last nodes are repeated. An example of a cycle is: (Node1 - Node2 - Node3 -
Node1).
A cycle cannot traverse the same edge twice. For example, the cycle (Node1 - Node2 -
Node1) in an undirected graph only exists if there is more than one edge connecting Node1
and Node2. By this definition, self-loops count as cycles, though they cannot be part of any
larger cycles.
You can also select a web site from the following list
How to Get Best Site Performance
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.