The authors generalize Cartan's Lemma, a characterization of real space form, for any four orthonormal vector fields (instead of three) for an indefinite K-space.
机构:
Nanjing Normal Univ, Inst Math, Nanjing 210046, Jiangsu, Peoples R China
Shandong Agr Univ, Dept Math, Tai An 271018, Shandong, Peoples R ChinaNanjing Normal Univ, Inst Math, Nanjing 210046, Jiangsu, Peoples R China
Wang, Hanfeng
He, Wei
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机构:
Nanjing Normal Univ, Inst Math, Nanjing 210046, Jiangsu, Peoples R ChinaNanjing Normal Univ, Inst Math, Nanjing 210046, Jiangsu, Peoples R China