🌐EnglishEnglishEspañolNederlandsPortuguêsРусскийفارسی日本語EntityQ6268493· pop 5· linked from 12 articlesJohnson graphclass of undirected graphs defined from systems of setsAvailable in 4 languagesNederlandsUkrainianفارسیvia Wikidata sitelinks · CC0ConnectionsHamiltonian pathEntityeigenvectors and eigenvaluesEntityCategoriesParametric families of graphsRegular graphs