机构:
Harbin Inst Technol, Dept Math, Harbin 150001, Peoples R China
NE Normal Univ, Dept Math, Changchun 130024, Peoples R ChinaHarbin Inst Technol, Dept Math, Harbin 150001, Peoples R China
Chen, Liangyun
Meng, Daoji
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机构:
Nankai Univ, Dept Math, Tianjin 300071, Peoples R ChinaHarbin Inst Technol, Dept Math, Harbin 150001, Peoples R China