The permutation of integers with small least common multiple of two subsequent terms |
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Authors: | Yong-Gao Chen Cheng-Shuang Ji |
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Institution: | 1.School of Mathematical Sciences and Institute of Mathematics,Nanjing Normal University,Nanjing,P.R. of China |
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Abstract: | Erd?s, Freud and Hegyvári 1] constructed a permutation a 1,a 2,… of positive integers with \(a_{i}, a_{i+1}]< i\exp \left\{c\sqrt{\log i}\log\log i\,\right\}\) for an absolute constant c>0 and all i≧3. In this note, we construct a permutation of all positive integers such that for any ε>0 there exists an i 0 with \(a_{i}, a_{i+1}]\allowbreak < i\exp \left\{\left(2\sqrt{2}+\varepsilon\right) \sqrt{\log i\log\log i}\,\right\}\) for all i≧i 0. |
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