Gray, Alfred Invariants of curvature operators of four-dimensional Riemannian manifolds. (English) Zbl 0278.53034 Proc. 13th biennial Sem. Canad. math. Congr. differ. Topol. differ. Geom. Appl., Dalhousie Univ. Halifax 1971, 2, 42-65 (1972). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 3 Documents MSC: 53C20 Global Riemannian geometry, including pinching 53C65 Integral geometry 53C55 Global differential geometry of Hermitian and Kählerian manifolds PDF BibTeX XML