Bochner-Kahler metrics

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dc.creatorBryant, Robert L.
dc.date2000-03-16
dc.date2000-06-27
dc.date.accessioned2026-07-07T04:34:20Z
dc.date.available2026-07-07T04:34:20Z
dc.descriptionA Kahler metric is said to be Bochner-Kahler if its Bochner curvature vanishes. This is a nontrivial condition when the complex dimension of the underlying manifold is at least 2. In this article it will be shown that, in a certain well-defined sense, the space of Bochner-Kahler metrics in complex dimension n has real dimension n+1 and a recipe for an explicit formula for any Bochner-Kahler metric will be given. It is shown that any Bochner-Kahler metric in complex dimension n has local (real) cohomogeneity at most n. The Bochner-Kahler metrics that can be `analytically continued' to a complete metric, free of singularities, are identified. In particular, it is shown that the only compact Bochner-Kahler manifolds are the discrete quotients of the known symmetric examples. However, there are compact Bochner-Kahler orbifolds that are not locally symmetric. In fact, every weighted projective space carries a Bochner-Kahler metric. The fundamental technique is to construct a canonical infinitesimal torus action on a Bochner-Kahler metric whose associated momentum mapping has the orbits of its symmetry pseudo-groupoid as fibers.
dc.description93 pages, 3 figures, converted to latex2e with amsart and hyperref packages, more typos corrected, new material and references added about relations with other work, and some statements revised for clarity or historical accuracy
dc.identifierhttps://arxiv.org/abs/math/0003099
dc.identifierhttp://arxiv.org/abs/math/0003099
dc.identifierJ. Amer. Math. Soc. 14 (2001), 623--715.
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/58862
dc.subjectDifferential Geometry
dc.subjectSymplectic Geometry
dc.subject53B35 (Primary), 53C55
dc.titleBochner-Kahler metrics
dc.typetext

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