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arXiv math/0411169math.DG
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具有平坦法丛的极小图的稳定性和曲率估计

Stability and curvature estimates for minimal graphs with flat normal bundles

Mu-Tao Wang

摘要:

余维为1的极小图是稳定的,即面积泛函的二阶变分是非负的。这对于更高余维的极小图不再成立。本文证明了任意余维数的极小图是稳定的,如果它的法丛是平坦的。证明了维数不大于大于6且余维数平坦的极小图的法丛是平坦的且无穷远点的密度是有限的。如果我们在体积元上附加增长条件,则这样的Bernstein型定理在任何维数下都成立。

英文摘要:

It is well-known that a minimal graph of codimension one is stable, i.e. the second variation of the area functional is non-negative. This is no longer true for higher codimensional minimal graphs. In this note, we prove that a minimal graph of any codimension is stable if its normal bundle is flat. We also prove minimal graphs of dimension no greater than six and any codimension is flat if the the normal bundle is flat and the density at infinity is finite. Such a Bernstein type theorem holds in any dimension if we assume additionally growth conditions on the volume element.

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