Curvature and Topology of Riemannian Manifolds : Proceedings of the 17th International Taniguchi Symposium held in Katata Japan Aug. 26–31 1985 Structure of manifolds of nonpositive sectional curvature Combinatorial problems in spectral geometry A vanishing theorem for piecewise constant curvature spaces L subgroups in spaces of nonpositive curvature On a compactification of the set of Riemannian manifolds with bounded curvatures and diameters Large Riemannian manifolds Analytic inequalities and rough isometries between non compact Riemannian manifolds Gap theorems for certain submanifolds of euclidean space and hyperbolic space form II A pinching problem for locally homogeneous spaces Remarks on the injectivity radius estimate for almost 1 4 pinched manifolds Non homogeneous Kähler Einstein metrics on compact complex manifolds Curvature deformations The first eigenvalue of the laplacian of an isoparametric minimal hypersurface in a unit sphere On deformation of Riemannian metrics and manifolds with positive curvature operator Quasiconformal mappings and manifolds of negative curvature Helical immersions On topological Blaschke conjecture III Critical points of Busemann functions on complete open surfaces L functions in geometry and some applications Stability of harmonic maps and eigenvalues of laplacian Uniformly locally convex filtrations on complete riemannian manifolds Einstein metrics with positive scalar curvature.