B-sub-manifolds and their stability

Details B-sub-manifolds and their stability B-sub-manifolds and their stability

2003-04-30

arxiv.org/abs/math/0304493v1

Math. Nach, 279(2006)1597-1601

Mathematics

Differential Geometry

10 pages

Scientific paper

In this paper, we introduce a concept of B-minimal sub-manifolds and discuss the stability of such a sub-manifold in a Riemannian manifold $(M,g)$. Assume $B(x)$ is a smooth function on $M$. By definition, we call a sub-manifold $\Sigma$ {\em B-minimal} in $(M,g)$ if the product sub-manifold $\Sigma\times S^1$ is a {\em minimal} sub-manifold in a warped product Riemannian manifold $(M\times S^1, g+e^{2B(x)}dt^2)$, so its stability is closely related to the stability of solitons of mean curvature flows as noted earlier by G. Huisken, S. Angenent, and K. Smoczyk. We can show that the "grim reaper" in the curve-shortening problem is stable in the sense of "symmetric stable" defined by K. Smoczyk. We also discuss the graphic B-minimal sub-manifold in $R^{n+k}$.

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