The symmetry of warped product space-times

SEMI-RIEMANNIAN GEOMETRY With Applications to Relativity

M. A. H. MacCallum · Bulletin of the London Mathematical Society · 1984 · 1.7K citations

Humanities, Electronic Publishing, Geometry +7

Manifolds of negative curvature

Richard L. Bishop, Barrett O’Neill · Transactions of the American Mathematical Society · 1969 · 1.1K citations · Full text

Some Spatially Homogeneous Anisotropic Relativistic Cosmological Models

R. Kantowski, Rainer K. Sachs · Journal of Mathematical Physics · 1966 · 707 citations

Friedmann Models, Alternative Cosmology, Engineering +9

Certain conditions for a Riemannian manifold to be isometric with a sphere

Morio Obata · Journal of the Mathematical Society of Japan · 1962 · 689 citations · Full text

Certain Conditions, Global Geometry, Geometry +4

Structure theorems on Riemannian spaces satisfying $R(X,\,Y)\cdot R=0$. I. The local version

Zoltán Szabó · Journal of Differential Geometry · 1982 · 358 citations · Full text

Global Geometry, Geometry, Riemannian Spaces +5