Why is the wreath product so named?
If possible, please provide a citation.
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Charles Wells' 1976 paper Some Applications of the Wreath Product Construction (The American Mathematical Monthly, Vol. 83, No. 5) states that the wreath product nomenclature came from Pólya's 1937 paper Kombinatorische Anzahlbestimmungen für Gruppen, Graphen und chemische Verbindungen (Pólya used the term Kranzgruppe). See pages 333 and 334 of Wells' paper (journal pagination). I don't know if Pólya discussed this choice of terminology in any of his papers or correspondence.