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The Iteration of Certain Arithmetic Functions
Published online by Cambridge University Press: 20 November 2018
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1. Introduction. For define C(n) to be the integer j such that , where denotes the j th iterate of the Euler ø-function. Define C(l) = C(2) = 0. This function has been studied by S. S. Pillai [1], with the notation R(n) for 1 + C(n) if , and R(l) = 0. H. Shapiro [2] has also investigated this function, proving the basic relations
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- Copyright © Canadian Mathematical Society 1950
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