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arXiv 1506.01263math.AG
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Berkovich曲线上的权函数

Weight functions on Berkovich curves

Matthew Baker, Johannes Nicaise

摘要:

设$C$是完备离散域$K$上的曲线.我们给出了附在$C$上的多规范形式上的权函数的热带描述以及$C$的基本骨架。我们表明,拉普拉斯算子的权函数等于pluricanonical因子上的Berkovich Ekieta,我们描述的基本骨架$C$的组合骨架的最小$snc$模型的Berkovich骨架。特别地,如果$C$具有半稳定约化,则基本骨架与最小骨架重合。作为一个中间步骤,我们描述的最小$snc$模型的对数pluicanonical线丛的基轨迹。

英文摘要:

Let $C$ be a curve over a complete discretely valued field $K$. We give tropical descriptions of the weight function attached to a pluricanonical form on $C$ and the essential skeleton of $C$. We show that the Laplacian of the weight function equals the pluricanonical divisor on Berkovich skeleta, and we describe the essential skeleton of $C$ as a combinatorial skeleton of the Berkovich skeleton of the minimal $snc$-model. In particular, if $C$ has semi-stable reduction, then the essential skeleton coincides with the minimal skeleton. As an intermediate step, we describe the base loci of logarithmic pluricanonical line bundles on minimal $snc$-models.

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