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arxiv: 0907.0916 · v1 · submitted 2009-07-06 · 🧮 math.NT

On the random variable N^r ni (k₁, k₂, ..., k_r) mapsto gcd(n,k₁k₂... k_r) in N

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keywords mapstorandomvariableanalysisanaougueaveragecomputecomputed
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We compute the "moments" and its continuous anaougue of the random variable $\N^r \ni (k_1, k_2, ..., k_r) \mapsto \gcd(n,k_1k_2... k_r) \in \N$ by a purely elementary method. This generalizes a result of Kurokawa-Ochiai, which computed its "average" using some analysis involving L-function.

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