On the Berwald-Weyl Curvature
arxiv(2024)
Abstract
In this paper, we study the Berwald-Weyl curvature which is defined for a
spray/Finsler metric with a volume form. We obtain some expressions for the
Berwald-Weyl curvature. This quantity is a projective invariant with respect to
a fixed volume form. We prove that for any spray of scalar curvature on a
manifold of dimension n≥ 3, the Berwald-Weyl curvature vanishes with
respect to any volume form. We also show that for any Finsler metric of
constant Ricci curvature and constant S-curvature, the Berwald-Weyl curvature
vanishes with respect to the Busemann-Hausdorff volume form. This study leads
to a new notion of BWeyl-flat sprays/Finsler metrics.
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