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Similarity (network science) : ウィキペディア英語版 | Similarity (network science)
Similarity in network analysis occurs when two nodes (or other more elaborate structures) fall in the same equivalence class. There are three fundamental approaches to constructing measures of network similarity: structural equivalence, automorphic equivalence, and regular equivalence.〔Newman, M.E.J. 2010. ''Networks: An Introduction.'' Oxford, UK: Oxford University Press.〕 There is a hierarchy of the three equivalence concepts: any set of structural equivalences are also automorphic and regular equivalences. Any set of automorphic equivalences are also regular equivalences. Not all regular equivalences are necessarily automorphic or structural; and not all automorphic equivalences are necessarily structural.〔 == Visualizing similarity and distance ==
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