Differential Geometry
Closed hypersurfaces of S4(1) with constant mean curvature and zero Gauß–Kronecker curvature
[Hypersurfaces fermées de S4(1) à courbure moyenne constante et à courbure de Gauß–Kronecker nulle]
Comptes Rendus. Mathématique, Tome 340 (2005) no. 6, pp. 437-440.

Nous considérons une hypersurface fermée (compacte et sans bord) M3S4(1) à courbure de Gauß–Kronecker identiquement nulle. Nous prouvons que si la courbure moyenne H de M3 est constante, alors l'hypersurface M3 est necéssairement minimale, c.à.d, H=0. Ce résultat généralise celui obtenu dans l'article de Ramanathan (Math. Z. 205 (1990) 645–658) concernant les hypersurfaces fermées minimales à courbure de Gauß–Kronecker identiquement nulle dans S4(1).

We consider a closed hypersurface M3S4(1) with identically zero Gauß–Kronecker curvature. We prove that if M3 has constant mean curvature H, then M3 is minimal, i.e., H=0. This result extends Ramanathan's classification (Math. Z. 205 (1990) 645–658) result of closed minimal hypersurfaces of S4(1) with vanishing Gauß–Kronecker curvature.

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DOI : 10.1016/j.crma.2005.01.005
Lusala, Tsasa 1 ; Gomes de Oliveira, André 1

1 Instituto de Matemática e Estatística (IME), Universidade de São Paulo (USP), Rua do Matão, 1010, Cidade Universitária, CEP 05508-090 São Paulo – SP, Brazil
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Lusala, Tsasa; Gomes de Oliveira, André. Closed hypersurfaces of $ {\mathbb{S}}^{4}(1)$ with constant mean curvature and zero Gauß–Kronecker curvature. Comptes Rendus. Mathématique, Tome 340 (2005) no. 6, pp. 437-440. doi : 10.1016/j.crma.2005.01.005. http://www.numdam.org/articles/10.1016/j.crma.2005.01.005/

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