
Let φ \varphi be Euler’s function. Upper and lower bounds are presented for D ( x ) D(x) , the density of the integers n n for which φ ( n ) / n ≦ x \varphi (n)/n \leqq x . The bounds, for x = 0 ( .01 ) 1 x = 0(.01)1 , have an average spread of less than 0.0203.
Special sequences and polynomials, Arithmetic functions; related numbers; inversion formulas, Asymptotic results on arithmetic functions
Special sequences and polynomials, Arithmetic functions; related numbers; inversion formulas, Asymptotic results on arithmetic functions
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