Congruence theorems for compact hypersurfaces of a riemannian manifold |
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Authors: | Chuan-Chih Hsiung Timothy P Lo |
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Institution: | (1) Bethlehem, Penn. |
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Abstract: | Summary Let Mm,
m be two m-dimensional compact oriented hypersurfaces of class C3 immersed in a Riemannian manifold Rm+1 of constant sectional curvature. Suppose that Rm+1 admits a one-parameter continuous group G of conformal transformations satisfying a certain condition (which holds automatically
when G is a group of isometric transformations). Suppose further that there is a1 − 1 transformation Tτ ∈ G between Mm and
m such that
for each P ∈ Mm and each
m. If the r-th mean curvature for any r, 1 ⩽ r ⩽ m, of Mm at each point P ∈ Mm is equal to that of
m at the corresponding point
, together with other conditions, then Mm and
m are congruent mod G. This is a generalization of a joint theorem ofH. Hopf andY. Katsurada 5] in which G is a group of isometric transformations.
Entrata in Redazione il 13 Giugno 1975.
The first author was partially supported by the National Science Foundation grant GP-33944. |
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Keywords: | |
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