Collapsing vs. Positive Pinching

A.D. Alexandrov spaces with curvature bounded below

Yu. D. Burago, M. Gromov, G. Perelman · Russian Mathematical Surveys · 1992 · 421 citations

A.d. Alexandrov Spaces, Global Geometry, Geometry +7

Nilpotent structures and invariant metrics on collapsed manifolds

Jeff Cheeger, Kenji Fukaya, Mikhael Gromov · Journal of the American Mathematical Society · 1992 · 203 citations

Global Geometry, Geometry, Nilpotent Structures +7

New examples of manifolds with strictly positive curvature

J.-H. Eschenburg · Inventiones mathematicae · 1982 · 199 citations

Global Geometry, Geometry, Riemannian Geometry +2

The Fundamental Groups of Almost Nonnegatively Curved Manifolds

Kenji Fukaya, Takao Yamaguchi · Annals of Mathematics · 1992 · 177 citations

Geometric Group Theory, Global Geometry, Riemannian Geometry +2

Contributions to Riemannian Geometry in the Large

Wilhelm Klingenberg · Annals of Mathematics · 1959 · 152 citations

Riemannian Geometry, Global Geometry, Riemannian Manifold +1