4. (With Zhiguang Hu and Huaying Zhan) A condition on the congruence of nonsymmetric matrices, College Mathematics, Volume 4 2015.

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上一条:3.(With Paul Lee and Igor Zelenko) Ricci curvature lower bounds for sub-Riemannian structures on Sasakian manifolds. Discrete and continuous dynamical systems A, 36(1):303-321, 2015. 下一条:5.Chengbo Li. On curvature-type invariants for natural mechanical systems on sub-Riemannian structures associated with a principal G-bundle. INDAM Geometric control theories and sub-Riemannian geometry, 263-285, 2014.