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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.

4 votes

"Gluing and copy" graphs

This class is the same as the $\Delta$-confluent graphs introduced by Eppstein, Goodrich, and Meng (Delta-confluent Drawings). It is easy to see that $\Delta$-confluent graphs are closed under the ope …
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2 votes

Are these inclusions between graph classes correct? for ISGCI

Replaced earlier answer, which used an incorrect definition of interval filament graphs. Unipolar graphs are interval filaments graphs. Brief sketch: If $G$ is unipolar there are vertex sets $A$ and $ …
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