The equation $n_1n_2=n_3n_4$, the gcd-sum function and the mean values of certain character sums

Volume 152 / 2012

Huaning Liu, Wenguang Zhai Acta Arithmetica 152 (2012), 137-157 MSC: 11D45, 11N37, 11L40. DOI: 10.4064/aa152-2-2


  • Huaning LiuDepartment of Mathematics
    Northwest University
    Xi'an 710069, Shaanxi, P.R. China
  • Wenguang ZhaiDepartment of Mathematics
    China University of Mining and Technology
    Beijing 100083, P.R. China

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