Full-Rank Valuations and Toric Initial Ideals

Full-Rank Valuations and Toric Initial Ideals
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全等级估值和 Toric 初始理想

DOI:
10.1093/imrn/rnaa071
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发表时间:
2019
影响因子:
1
通讯作者:
L. Bossinger
L. Bossinger
中科院分区:
数学1区
文献类型:
--
作者:
L. Bossinger

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设V(I)是一个射影空间的积的极化射影簇或子簇,A是它的(多)齐次坐标环.对于$A$上的满秩赋值${\mathfrak{v}}$,我们关联一个权重向量w_{\mathfrak{v}}$。我们的主要结果是${\mathfrak{v}}$的值半群由$A$的生成元的象生成当且仅当$I$关于$w_{\mathfrak{v}}$的初始理想是素的。作为应用,我们证明了一个猜想[ 7]连接字符串多面体的Minkowski性质的热带旗品种。对于Grassmannian的Rietsch-Williams赋值,我们确定了一类具有非整相关Newton-Okounkov多面体的平面图(对于${\operatorname *{Gr}}_k(\mathbb C^n)$,$n\ge 6$和$k\ge 3$).
Let $V(I)$ be a polarized projective variety or a subvariety of a product of projective spaces, and let $A$ be its (multi-)homogeneous coordinate ring. To a full-rank valuation ${\mathfrak{v}}$ on $A$ we associate a weight vector $w_{\mathfrak{v}}$. Our main result is that the value semi-group of ${\mathfrak{v}}$ is generated by the images of the generators of $A$ if and only if the initial ideal of $I$ with respect to $w_{\mathfrak{v}}$ is prime. As application, we prove a conjecture by [ 7] connecting the Minkowski property of string polytopes to the tropical flag variety. For Rietsch-Williams’ valuation for Grassmannians, we identify a class of plabic graphs with non-integral associated Newton–Okounkov polytope (for ${\operatorname *{Gr}}_k(\mathbb C^n)$ with $n\ge 6$ and $k\ge 3$).
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DOI: 10.48550/arxiv.1307.1085
发表时间: 2013
期刊: arXiv e-prints
影响因子: --
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