Journal of the Mathematical Society of Japan

Spherical rigidities of submanifolds in Euclidean spaces

Qing-Ming CHENG

Full-text: Open access

Abstract

In this paper, we study n-dimensional complete immersed submanifolds in a Euclidean space En+p. We prove that if Mn is an n-dimensional compact connected immersed submanifold with nonzero mean curvature H in En+p and satisfies either:

(1)Sn2H2n-1, or

(2)n2H2(n-1)Rn-2,

then Mn is diffeomorphic to a standard n-sphere, where S and R denote the squared norm of the second fundamental form of Mn and the scalar curvature of Mn, respectively.

On the other hand, in the case of constant mean curvature, we generalized results of Klotz and Osserman [11] to arbitrary dimensions and codimensions; that is, we proved that the totally umbilical sphere Sn(c), the totally geodesic Euclidean space En, and the generalized cylinder Sn-1(c)×E1 are only n-dimensional (n>2) complete connected submanifolds Mn with constant mean curvature H in En+p if Sn2H2/(n-1) holds.

Article information

Source
J. Math. Soc. Japan, Volume 56, Number 2 (2004), 475-487.

Dates
First available in Project Euclid: 3 October 2007

Permanent link to this document
https://projecteuclid.org/euclid.jmsj/1191418640

Digital Object Identifier
doi:10.2969/jmsj/1191418640

Mathematical Reviews number (MathSciNet)
MR2048469

Zentralblatt MATH identifier
1066.53013

Subjects
Primary: 53C42: Immersions (minimal, prescribed curvature, tight, etc.) [See also 49Q05, 49Q10, 53A10, 57R40, 57R42]

Keywords
Submanifolds differentiable sphere locally convex hypersurfaces generalized cylinder mean curvature squared norm of the second fundamental form

Citation

CHENG, Qing-Ming. Spherical rigidities of submanifolds in Euclidean spaces. J. Math. Soc. Japan 56 (2004), no. 2, 475--487. doi:10.2969/jmsj/1191418640. https://projecteuclid.org/euclid.jmsj/1191418640


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