You could tag each vertex or edge with a "visited" flag. Set "visited" to false initially. Then use a traversal algorithm to traverse the graph, starting at any vertex or edge. When each vertex or edge gets visited, check the state of the "visited" flag. If true, then stop because there is a cycle, because there is more than one route to that vertex or edge. If it's false, set it to true, and move on to the next vertex or edge. Regards, Markus. Chartier Nicolas wrote:

I wonder if someone knows an easy way to detect cycles in a graph. Any suggestion welcome ;)

NC

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