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arXiv math/0603738math.CVmath.AG
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质量控制流的正则化与奇异Morse不等式

Regularisation of Currents with Mass Control and Singular Morse Inequalities

Dan Popovici

摘要:

设$X$是一个紧复形,不一定是Kähler流形,维数为$n$。我们证明了在$L$的第一Chern类中,任何全纯线丛$L\to X$的体积是所有闭正流$T$上的Monge-Ampère质量$\int_X T_{ac}^n$的上确界,其中$T_{ac}$是Lebesgue分解中的绝对连续部分.这个结果是在非Kähler背景下的新结果,可以看作是赋予任意奇异厄米特度量的线丛的高张量幂幂的上同调的全纯Morse不等式。特别地,根据满足正性条件的奇异厄米度量的存在性,给出了线丛的一个新的大性判据。证明是基于一个新的正规化建设封闭的$(1, 1)$电流与控制的蒙赫-安培群众的近似序列。为此,我们证明了一个潜在的理论结果在一个复变数和研究的增长乘数理想层越来越奇异的度量。

英文摘要:

Let $X$ be a compact complex, not necessarily Kähler, manifold of dimension $n$. We characterise the volume of any holomorphic line bundle $L\to X$ as the supremum of the Monge-Ampère masses $\int_X T_{ac}^n$ over all closed positive currents $T$ in the first Chern class of $L$, where $T_{ac}$ is the absolutely continuous part in the Lebesgue decomposition. This result, new in the non-Kähler context, can be seen as holomorphic Morse inequalities for the cohomology of high tensor powers of line bundles endowed with arbitrarily singular Hermitian metrics. It gives, in particular, a new bigness criterion for line bundles in terms of existence of singular Hermitian metrics satisfying positivity conditions. The proof is based on the construction of a new regularisation for closed $(1, 1)$-currents with a control of the Monge-Ampère masses of the approximating sequence. To this end, we prove a potential-theoretic result in one complex variable and study the growth of multiplier ideal sheaves associated with increasingly singular metrics.

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