Abstract
To any (0, 2)-tensor field on the tangent bundle of a Riemannian manifold, we associate a global matrix function. Based on this fact, natural tensor fields are defined and characterized, essentially by means of well-known algebraic results. In the symmetric case, this classification coincides with the one given by Kowalski–Sekizawa; in the skew-symmetric one, it does with that obtained by Janyška.
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Calvo, M.d.C., Keilhauer, G.G.R. Tensor Fields of Type (0, 2) on the Tangent Bundle of a Riemannian Manifold. Geometriae Dedicata 71, 209–219 (1998). https://doi.org/10.1023/A:1005084210109
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DOI: https://doi.org/10.1023/A:1005084210109