20,686 research outputs found

    Averages by the sieve method

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    Sieve functions in arithmetic bands

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    An arithmetic function ff is called a {\it sieve function of range} QQ, if its Eratosthenes transform g=f∗μg=f\ast\mu is supported in [1,Q]∩N[1,Q]\cap\N, where g(q)≪εqεg(q)\ll_{\varepsilon} q^{\varepsilon} (∀ε>0\forall\varepsilon>0). Here, we study the distribution of ff over short {\it arithmetic bands} ∪1≤a≤H{n∈(N,2N]:n≡a ( mod  q)}\cup_{1\le a\le H}\{n\in(N,2N]: n\equiv a\, (\bmod\,q)\}, with H=o(N)H=o(N), and give applications to both the correlations and to the so-called weighted Selberg integrals of ff, on which we have concentrated our recent research.Comment: Small improvements for the expositio

    Sieving for pseudosquares and pseudocubes in parallel using doubly-focused enumeration and wheel datastructures

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    We extend the known tables of pseudosquares and pseudocubes, discuss the implications of these new data on the conjectured distribution of pseudosquares and pseudocubes, and present the details of the algorithm used to do this work. Our algorithm is based on the space-saving wheel data structure combined with doubly-focused enumeration, run in parallel on a cluster supercomputer
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