Structure of flat subspaces in low-dimensional manifolds of nonpositive curvature

Manifolds of negative curvature

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

Natural Sciences, Geophysics, Computational Geometry +16

Visibility manifolds

Patrick Eberlein, Barrett O’Neill · Pacific Journal of Mathematics · 1973 · 350 citations · Full text

Manifolds of negative curvature

M. Gromov · Journal of Differential Geometry · 1978 · 175 citations

Natural Sciences, Geophysics, Computational Geometry +16

Compact manifolds of nonpositive curvature

H. Blaine Lawson, Shing Tung Yau · Journal of Differential Geometry · 1972 · 157 citations · Full text

Natural Sciences, Mathematics, Topology +11

Manifolds of nonpositive curvature and their buildings

Keith Burns, Ralf Spatzier · Publications mathématiques de l IHÉS · 1987 · 156 citations · Full text

Natural Sciences, Mathematics, Geometry +10