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arXiv math/0512379math.CVmath.DG
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射影流形中正全纯链的射影连接与有界性(I)

Projective Linking and Boundaries of Positive Holomorphic Chains in Projective Manifolds, Part I

F. Reese Harvey, H. Blaine Lawson

摘要:

在复射影n-空间P^n中引入了2 p-1维紧致实子流形M的射影环绕数Link(M,Z)的概念,并在P^n-M中引入了余维p的代数子簇Z.这个概念与射影卷绕数和拟多重次调和函数有关,它直接从P^n推广到任何射影流形.本文的第1部分对p=1的情形建立了以下结果。设M是P^n中有向的、稳定的实解析曲线。则M是P^n-M中的正全纯1-链T的边界当且仅当对P^n-M中的所有代数超曲面Z,Link(M,Z)> -Kdeg(Z)。一个类似的定理隐含在任何射影流形中。本文的第2部分研究了p>1时的类似结果。

英文摘要:

We introduce the notion of the projective linking number Link(M,Z) of a compact oriented real submanifold M of dimension 2p-1 in complex projective n-space P^n with an algebraic subvariety Z in P^n - M of codimension p. This notion is related to projective winding numbers and quasi-plurisubharmonic functions, and it generalizes directly from P^n to any projective manifold. Part 1 of this paper establishes the following result for the case p=1. Let M be an oriented, stable, real analytic curve in P^n. Then M is the boundary of a positive holomorphic 1-chain T with Mass(T) < K in P^n if and only if Link(M,Z) > -K deg(Z) for all algebraic hypersurfaces Z in P^n - M. An analogous theorem is implied in any projective manifold. Part 2 of this paper studies similar results for p>1.

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