Mathematics – Differential Geometry
Scientific paper
2008-05-02
Glasg. Math. J. 51 (2009), no. 3, 669--680.
Mathematics
Differential Geometry
10 pages
Scientific paper
10.1017/S0017089509990085
We show that a complete submanifold $M$ with tamed second fundamental form in a complete Riemannian manifold $N$ with sectional curvature $K_{N}\leq \kappa \leq 0$ are proper, (compact if $N$ is compact). In addition, if $N$ is Hadamard then $M$ has finite topology. We also show that the fundamental tone is an obstruction for a Riemannian manifold to be realized as submanifold with tamed second fundamental form of a Hadamard manifold with sectional curvature bounded below.
Bessa Gregorio Pacelli
Costa Silvana M.
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