Browsing by Title "Values of Arithmetical Functions Equal to a Sum of Two Squares"

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  • Values of Arithmetical Functions Equal to a Sum of Two Squares 

    Banks, William David, 1964-; Luca, Florian; Saidak, Filip; Shparlinski, Igor E. (Oxford University Press, 2005)
    Let '(n) denote the Euler function. In this paper, we determine the order of growth for the number of positive integers n ≤ x for which '(n) is the sum of two square numbers. We also obtain similar results for the Dedekind ...