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Results tagged with graph-theory
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user 39654
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.
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Is a simply connected locally 2-connected complex a union of spheres and planes?
I checked: Bing's "house with two rooms" (see for instance here for a nice picture) is an example: It is a contractible but not collapsible finite 2-dimensional complex. Since it is contractible, it c …
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