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On the ingham divisor problem
Authors:A I Pavlov
Institution:(1) V. A. Steklov Mathematics Institute, Russian Academy of Sciences, USSR
Abstract:The main result of this paper is the following theorem. Suppose thatτ(n) = ∑ d|n l and the arithmetical functionF satisfies the following conditions:
1)  the functionF is multiplicative;
2)  ifF(n) = ∑ d|n f(d), then there exists an α>0 such that the relationf(n)=O(n −α) holds asn→∞.
Then there exist constantsA 1,A 2, andA 3 such that for any fixed \g3\s>0 the following relation holds:

$$\sum\limits_{n \leqslant x} {r(n)} r(n  +  1)F(n) = A_1 xln^{\text{2}} x + A_{\text{2}} xlnx + A_{\text{3}} x + O(x^{5/6 + \varepsilon }  + x^{1 - \alpha /6 + \varepsilon } ),    x  \to  \infty .$$
. Moreover, if for any primep the inequality \vbf(p)\vb\s<1 holds and the functionF is strongly multiplicative, thenA 1\s>0. Translated fromMatematicheskie Zametki, Vol. 68, No. 3, pp. 429–438, September, 2000.
Keywords:Ingham divisor  Ingham’  s equality  arithmetical function  Heath-Brown theorem
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