Is Dijkstras algorithm for directed or undirected graphs? Yes Dijkstra work for both directed undirected graph but all edge weight should be +ve Because if any weight is -ve, then it may fail to give the correct answer It works on undirected graph because in Dijkstra, we should always seen that minimum edge weight From its source vertex
vertices - Undirected connected graphs - Stack Overflow I'm confused as to whether an undirected graph can be considered connected? For example: A---B---C Say that we have three vertices, A, B and C If the graph is undirected like the one above, is it connected? A reaches B, but does it reach C? Another example: A--->B<---C Am I correct to say this directed graph is not connected because A cannot
What is the difference between a directed and undirected graph In undirected graph 2-3 means the edge has no direction, i e 2-3 means you can go both from 2 to 3 and 3 to 2 Note that in the representation of your graph, if you are using an adjacency matrix, directed 2->3 means adj[2][3]=true but adj[3][2]=false
discrete mathematics - Can an undirected graph strongly connected . . . For an undirected graph, we simply say that it is connected when there is a path between any two vertices There are then (at least) two ways to generalize this notion to directed graphs: Weakly connected if there is an undirected path between any two vertices, not necessarily respecting the orientations on the edges
algorithm - Cycles in an Undirected Graph - Stack Overflow An undirected graph is acyclic (i e , a forest) if a DFS yields no back edges Since back edges are those edges (u, v) connecting a vertex u to an ancestor v in a depth-first tree, so no back edges means there are only tree edges, so there is no cycle So we can simply run DFS If find a back edge, there is a cycle
Are Trees Directed or Undirected Graphs? - Stack Overflow @VinothKumar The Wikipedia page describes trees in the context of graph theory, where a tree is indeed an special case of an undirected graph In the context of programming however, what we call trees are most of the time rooted trees with an implied direction from root to leaves
What is a good data structure to represent an undirected graph? Using them in an undirected fashion involves trade offs (space verses speed) this course material goes into more detail on the adjacency list style and provides some thoughts on the possible alterations for use in undirected usage
Graphviz Dot, mix directed and undirected - Stack Overflow For my application I need to represent simultaneously (on the same graph) two relations: one is simmetric, the other is not Targets: Ideally the two relation should result in edges having different
Finding all cycles in undirected graphs - Stack Overflow Finding all cycles in an undirected graph Cycles in an Undirected Graph-> detects only whether there is a cycle or not Finding polygons within an undirected Graph -> very nice description, but no solution Finding all cycles in a directed graph-> finds cycles only in directed graphs Detect cycles in undirected graph using boost graph library
Can we have undirected edges and directed edges in a graph The directed edges of these graphs are used to indicate a causal connection between two events, in which the outcome of the first event influences the probability of the second event Undirected edges, instead, indicate a non-causal correlation between two events A connected component of the undirected subgraph of a chain graph is called a chain