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Cograph

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 0 By others on same topic  0 Discussions  1970-01-01  See my version
A **cograph** is a type of graph that can be defined as a graph without any induced subgraphs that are isomorphic to a path of four vertices (also known as a **P4**). In simpler terms, cographs can be constructed using two operations: the **disjoint union** and the **join** (or clique-sum) of two graphs.

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