IDEAL BOUNDARY OF CAT(0) SPACES

  • Published : 1998.01.01

Abstract

In this paper we prove the Hopf-Rinow theorem for CAT(0) spaces and show that the ideal boundaries of complete CAT(0) manifolds of dimension 2 or 3 with some additional conditions are homeomorphic to the circle or 2-sphere by the characterization of the local shadows around the branch points.

Keywords

References

  1. Enseign. Math. v.36 The Hadamard-Cartan Theorem in Locally convex Metric Soace S. B. Alexander;R. L. Bishop
  2. DMW seminar band no.25 Lectures in space of nonpositive curcature W. Ballmann
  3. Progrtss in Math. v.61 Manifolds of Nonpositive Curvature W. Ballmann;M. Gromov;V. Schroeder
  4. Geometry4 (Non-regular Riemannian Geomerty), Encyclopedia of Mathematical Sciences v.70 Multidimensional generalized Riemannian spaces V. N. Berestovskij;I. G. Nikolaev;Yu. G. Reshetnyak(eds.)
  5. On the exitence of flat planes in soaces of nonpositive curvature Martin R. Bridson
  6. The geometry of geodesics H. Busemann
  7. J. of Diff. Geo. v.34 Hyperbolization of polyhedra M. Davis;T. Januszkiewicz
  8. Proc. of ICM The topology of manifolds and cell-like maps R. D. Edwards
  9. Ann. of Math. Studies v.97 Hyperbolic Manifolds, Groups and Actions, Riemann Surfaces and Related Topics M. Gromov
  10. Essays in group theory v.8 Hyperbolic groups M. Gromov;S. M. Gersten(eds.)
  11. Proc. Workshop in Pure Math.(DaeWoo) v.12 An Introduction to the Geometry of Alexandrov Spaces K. Shiohama