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Continue to ChatRings such that, for each unit u, u - u(n) belongs to the Jacobson radical - https://avesis.gazi.edu.tr/yayin/b743d34f-1e3a-44b8-9b76-e5ab7706b1ef/rings-such-that-for-each-unit-u-u-un-belongs-to-the-jacobson-radical