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Results tagged with graph-theory
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user 517864
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
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Homomorphisms relationship with Graph Degeneracy
Let $H, G$ be finite undirected graphs. We say that $H$ is $r$-degenerate if there exists an ordering of the vertices of $H$ such that the back degree of every vertex is at most $r$. This is equivalen …
6
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0
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Reference to a definition of a graph homology
Let $G$ be a graph, and define $C_k$ to be the free abelian group on the homomorphisms from graphs $H$ such that $K_k$ is a minor of $H$ without needing to do any vertex deletions, only edge contracti …