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arXiv:math/0609492 [math.DG]AbstractReferencesReviewsResources

Extrinsci radius pinching in space forms of nonnegative sectional curvature

Julien Roth

Published 2006-09-18Version 1

We give new estimates for the extrinsic radius of compact hypersurfaces of the Euclidean space and the open hemisphere in terms of high order mean curvatures. Then we prove pinching results corresponding to theses estimates. We show that under a suitable pinching condition, the hypersurface is diffeomorphic and almost isometric to a geodesic hypersphere.

Comments: 16 pages
Journal: Mathematische Zeitschrift 258, 1 (2008) 227-240
Categories: math.DG
Subjects: 53A07, 53C20, 53C21
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