30 окт. 2022 г. · There are two classic ways of finding cycles in graphs: one is by using DFS (depth first search) algorithm and label the edges and look for ...

1 окт. 2013 г. · An undirected graph has a cycle if and only if a depth-first search (DFS) finds an edge that points to an already-visited vertex (a back edge).

6 апр. 2020 г. · I am trying to understand the time complexity of some efficient methods of detecting cycles in a graph. Two approaches for doing this are explained here.

30 сент. 2017 г. · In the recursive DFS, we can detect a cycle by coloring the nodes as WHITE , GRAY and BLACK as explained here.

21 июл. 2015 г. · The simplest approach to find cycles in a directed graph is as follows. Use three states of vertices: "not explored", "is being explored" ...

2 дек. 2016 г. · In a directed graph, a cycle is present if and only if a node is seen again before all its descendants have been visited. In other words, if a ...

16 авг. 2017 г. · Depth-First Search. If DFS finds an edge that points to an already discovered ancestor of the current node, the graph contains a cycle. After ...

11 сент. 2012 г. · I need a working algorithm for finding all simple cycles in an undirected graph. I know the cost can be exponential and the problem is NP-complete.

8 нояб. 2020 г. · Start with the first node within the selected nodes. · Mark current node as "visited". · Check if adjacent nodes are within selected nodes.

8 февр. 2009 г. · An undirected graph has a cycle if and only if a depth-first search (DFS) finds an edge that points to an already-visited vertex (a back edge).