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Results tagged with graph-theory
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user 21676
Questions about the branch of combinatorics called graph theory (not to be used for questions concerning the graph of a function). This tag can be further specialized via using it in combination with more specialized tags such as extremal-graph-theory, spectral-graph-theory, algebraic-graph-theory, topological-graph-theory, random-graphs, graph-colorings and several others.
1
vote
1
answer
8k
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how to proof "every loopless graph G has a bipartite subgraph with at least e(G)/2 edges"? [closed]
I am reading "introduction to graph theory" written by Douglas. I try to understand the proof of 1.3.19 theorem from this book but I failed...
Here is the statement.
$\text{Every loopless graph G has …
8
votes
5
answers
17k
views
How to find central vertex in a graph?
I am learning graph theory and some concept that I cannot figure it out. A vertex is central in $G$ if its greatest distance from any other vertex is as small as possible. Is there any algorithm to fi …
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