Riemannian Tori Without Conjugate Points are Flat. D. Burago, K. Teneblat (1994) Geometric and functional analysis
Riemannsche Flächen mit Eigenwerten in (0, ...). Peter Buser (1977) Commentarii mathematici Helvetici
Riesz transforms for symmetric diffusion operators on complete Riemannian manifolds. Xiang Dong Li (2006) Revista Matemática Iberoamericana
Rigidité forte des espaces riemanniens localement symétriques Jean-Louis Koszul (1974/1975) Séminaire Bourbaki
Rigidity and crystallographic groups, I. Frank Conolly, Tadeusz Kozniewski (1990) Inventiones mathematicae
Rigidity and sphere theorem for manifolds with positive Ricci Curvature. Changyu Xia (1994) Manuscripta mathematica
Rigidity for surfaces of non-positive curvature. Christopher B. Croke (1990) Commentarii mathematici Helvetici
Rigidity in non-negative curvature Luis Guijarro, Peter Petersen (1997) Annales scientifiques de l'École Normale Supérieure
Rigidity of convex domains in manifolds with nonnegative Ricci and sectional curvature. Viktor Schroeder, Martin Strake (1989) Commentarii mathematici Helvetici
Scalar Curvature, Non-Abelian Group Actions, and the Degree of Symmetry of Exotic Spheres Shing Tung Yau, H. Blaine jr. Lawson (1974) Commentarii mathematici Helvetici
Scalar curvature rigidity of asymptotically hyperbolic spin manifods. Maung Min-Oo (1989) Mathematische Annalen
Scalar-flat closed manifolds not admitting positive scalar curvature metrics. Akito Futaki (1993) Inventiones mathematicae