🌐EnglishEnglishDeutschFrançaisPortuguêsРусскийEntityQ123169377· pop 6Cassini's identityAlso known as Simson's identity, Cassini identity, Simson identitymathematical identity: F_{n - 1}F_{n + 1} - F_n^2 = (-1)^nAvailable in 6 languagesDeutschРусскийCatalanCroatianGreekvia Wikidata sitelinks · CC0CategoriesGiovanni Domenico Cassini