Great sphere foliations and manifolds with curvature bounded above

Details Great sphere foliations and manifolds with curvature bounded above Great sphere foliations and manifolds with curvature bounded above

1996-09-20

arxiv.org/abs/dg-ga/9609007v1

Mathematics

Differential Geometry

AMS-TeX v 2.1, 13 pages

Scientific paper

The survey is devoted to Toponogov's conjecture, that {\it if a complete simply connected Riemannian manifold with sectional curvature $\le 4$ and injectivity radius $\ge \pi/2$ has extremal diameter $\pi/2$, then it is isometric to CROSS}. In Section 1 the relations of problem with geodesic foliations of a round sphere are considered, but the proof of conjecture on this way is not complete. In Section 2 the proof based on recent results and methods for topology and volume of Blaschke manifolds is given.

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