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arXiv 2103.01912math.AG
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关于一般型曲面的典范映射的次数

On the degree of the canonical map of a surface of general type

Margarida Mendes Lopes, Rita Pardini

摘要:

设X是一般类型的极小复曲面,使得它的像通过典范映射是曲面;我们用d表示典范映射的度。在这篇简要的工作中,首先我们回忆一下当正则映射不是双有理的时候,正则像和d的已知可能性,这些可能性相当多,然后我们考虑为所有这些可能性给出具体例子的问题。我们提出了两种主要的方法建设这样的例子,我们给他们的应用程序的几个实例。最后,我们概述了关于这一主题的最新技术水平,并提出了几个问题。

英文摘要:

Let X be a minimal complex surface of general type such that its image via the canonical map is a surface; we denote by d the degree of the canonical map. In this expository work, first of all we recall the known possibilities for the canonical image and for d when the canonical map is not birational, which are quite a few, and then we consider the question of producing concrete examples for all of them. We present the two main methods of construction of such examples and we give several instances of their application. We end the paper outlining the state of the art on this topic and raising several questions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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