Labbi, M.L.
(Symmetry, Integrability and Geometry: Methods and Applications, 2007)
The (2k)-th Gauss-Bonnet curvature is a generalization to higher dimensions of the (2k)-dimensional Gauss-Bonnet integrand, it coincides with the usual scalar curvature for k =1. The Gauss-Bonnet curvatures are used in ...