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arXiv 1202.5989math.DG
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含有复叶的射影空间的黎曼叶解

Riemannian foliations of projective space admitting complex leaves

Thomas Murphy

摘要:

受Gray关于复射影空间中具有Fubini-Study度量的复子流形的管公式的工作的启发,研究了射影空间的黎曼叶理.证明了余维为1的$\mathbb{P}^n$的任何开子集都不存在复黎曼叶理。因此,没有黎曼面的射影平面的黎曼叶理,甚至局部。我们确定如何一个复杂的子流形可能会出现作为一个特殊的叶的非平凡奇异黎曼叶的最大尺寸。应用格雷管公式得到复二次曲面上某些全纯曲线的体积界。

英文摘要:

Motivated by Gray's work on tube formulae for complex submanifolds of complex projective space equipped with the Fubini-Study metric, Riemannian foliations of projective space are studied. We prove that there are no complex Riemannian foliations of any open subset of $\mathbb{P}^n$ of codimension one. As a consequence there is no Riemannian foliation of the projective plane by Riemann surfaces, even locally. We determine how a complex submanifold may arise as an exceptional leaf of a non-trivial singular Riemannian foliation of maximal dimension. Gray's tube formula is applied to obtain a volume bound for certain holomorphic curves of complex quadrics.

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