Space-like submanifolds with uint parallel mean curvature vector in de Sitter space(de Sitter空间中有单位平行平均曲率的类空子流形) von DONGTing(董婷), CHENYing(陈颖)

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Maximal space-like submanifolds in locally symmetric pseudo-Riemannian spaces(局部对称的伪黎曼流形中的极大类空子流形) von CHENYing(陈颖), DONGTing(董婷)

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