The homogeneous coordinate ring of a toric variety

The homogeneous coordinate ring of a toric variety
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DOI:
10.1090/s1056-3911-2013-00651-7
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发表时间:
2013-12
期刊:
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影响因子:
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通讯作者:
David A. Cox
David A. Cox
中科院分区:
其他
文献类型:
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作者:
David A. Cox

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本文引入复曲面簇X的齐次坐标环S。环S是一个多项式环,在决定X的扇环中,每个一维锥都有一个变量,并且S有一个自然分次,由X的Chow群An − 1(X)中的有效因子类的幺半群决定(其中n = dim X)。利用这个分次环,我们将证明X在许多方面表现得像射影空间。本文分为以下四个部分。
This paper will introduce the homogeneous coordinate ring S of a toric variety X . The ring S is a polynomial ring with one variable for each one-dimensional cone in the fan ∆ determining X , and S has a natural grading determined by the monoid of effective divisor classes in the Chow group A n − 1 ( X ) of X (where n = dim X ). Using this graded ring, we will show that X behaves like projective space in many ways. The paper is organized into four sections as follows.