Browsing Mathematics publications (MU) by Title "Roughly squarefree values of the Euler and Carmichael functions"
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Roughly squarefree values of the Euler and Carmichael functions
(Polish Academy of Sciences, Institute of Mathematics, 2005)Let ' denote the Euler function. In this paper, we estimate the number of positive integers n ≤ x with the property that if a prime p > y divides '(n), then p2 ∤ '(n). We also give similar estimates for the Carmichael function _.