Browsing by Author "Sun, Liling"

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    On the projective Ricci curvature
    (Springer, 2020-07) Shen, Zhongmin; Sun, Liling; Mathematical Sciences, School of Science
    The notion of the Ricci curvature is defined for sprays on a manifold. With a volume form on a manifold, every spray can be deformed to a projective spray. The Ricci curvature of a projective spray is called the projective Ricci curvature. In this paper, we introduce the notion of projectively Ricci-flat sprays. We establish a global rigidity result for projectively Ricci-flat sprays with nonnegative Ricci curvature. Then we study and characterize projectively Ricci-flat Randers metrics.