Home›Lemmas in graph theory›handshaking lemma🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoPolskiPortuguêsРусскийفارسیไทย中文日本語EntityQ954454· pop 18· linked from 33 articleshandshaking lemmalemma that every node-link graph has an even number of odd-degree verticesAvailable in 18 languagesEspañolFrançaisDeutsch中文РусскийPortuguêsItalianoArmenianCatalanGalicianConnectionsnodeEntityEulerian pathEntityCategoriesLemmas in graph theory