Sectional curvature in general relativity
This paper gives a detailed account of the sectional curvature function in general relativity from both the mathematical and the physical viewpoint. Some recent results are rederived by more systematic methods and some new results are obtained. Symmetries of the sectional curvature are also considered, as is the topological structure of the space of sectional curvature functions of all Lorentz metrics on a given four- dimensional manifold.
scientific article; zbMATH DE number 3994454