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Chen–Ricci Inequality for CR-Warped Products and Related Open Problems

  • Autores: Abdulqader Mustafa, Siraj Uddin
  • Localización: Mediterranean journal of mathematics, ISSN 1660-5446, Vol. 18, Nº. 2, 2021
  • Idioma: inglés
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  • Resumen
    • Chen–Ricci inequality is derived for CR-warped products in complex space forms, Theorem 4.1, involving an intrinsic invariant (Ricci curvature) controlled by extrinsic one (the mean curvature vector), which provides an answer for Problem 1. As a geometric application, this inequality is applied to derive a necessary condition for the immersed submanifold to be minimal in a complex Euclidean space, which presents a partial answer for the well-known problem proposed by S.S. Chern, Problem 2. Moreover, various applications are given. In addition, a rich geometry of CR-warped products appeared when the equality cases are discussed. Also, we extend this inequality to generalized complex space forms. In further research directions, we address a couple of open problems, namely Problems 3 and 4.


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