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Displaying similar documents to “A function related to the central limit theorem”

Sign changes of error terms related to arithmetical functions

Paulo J. Almeida (2007)

Journal de Théorie des Nombres de Bordeaux

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Let H ( x ) = n x φ ( n ) n - 6 π 2 x . Motivated by a conjecture of Erdös, Lau developed a new method and proved that # { n T : H ( n ) H ( n + 1 ) < 0 } T . We consider arithmetical functions f ( n ) = d n b d d whose summation can be expressed as n x f ( n ) = α x + P ( log ( x ) ) + E ( x ) , where P ( x ) is a polynomial, E ( x ) = - n y ( x ) b n n ψ x n + o ( 1 ) and ψ ( x ) = x - x - 1 / 2 . We generalize Lau’s method and prove results about the number of sign changes for these error terms.