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arXiv 2204.01889math.ACmath.AG
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符号Rees环有限生成的几个充要条件

Some necessary and sufficient condition for finite generation of symbolic Rees rings

Taro Inagawa, Kazuhiko Kurano

摘要:

考虑特征为0的域上开轨道上一点处的加权射影平面的爆破Y。我们假设在Y上存在一条曲线C,使得C^2<0且C.E=1,其中E是例外曲线。本文给出了Y的Cox环有限生成的一个(非常简单的)充要条件(定理1.2)。这是对He和Kurano-Nishida猜想的肯定回答。

英文摘要:

Consider the blow-up Y of a weighted projective plane at a point in the open orbit over a field of characteristic 0. We assume that there exists a curve C on Y such that C^2<0 and C.E=1, where E is the exceptional curve. In this paper we give a (very simple) necessary and sufficient condition for finite generation of the Cox ring of Y (Theorem~1.2). It is an affirmative answer to a conjecture due to He and Kurano-Nishida.

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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